/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 18:33:57,007 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 18:33:57,008 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 18:33:57,025 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 18:33:57,045 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-09 18:33:57,060 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 18:33:57,060 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 18:33:57,060 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 18:33:57,061 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 18:33:57,061 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 18:33:57,061 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 18:33:57,061 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 18:33:57,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 18:33:57,062 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 18:33:57,072 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 18:33:57,073 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 18:33:57,073 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 18:33:57,073 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 18:33:57,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 18:33:57,073 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 18:33:57,073 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 18:33:57,073 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 18:33:57,073 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 18:33:57,073 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 18:33:57,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 18:33:57,074 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 18:33:57,074 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 18:33:57,074 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 18:33:57,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:33:57,074 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 18:33:57,074 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 18:33:57,074 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 18:33:57,075 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 18:33:57,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 18:33:57,075 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 18:33:57,075 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 18:33:57,075 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 18:33:57,287 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 18:33:57,301 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 18:33:57,302 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 18:33:57,303 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 18:33:57,305 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 18:33:57,305 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun.wvr.bpl [2021-07-09 18:33:57,305 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun.wvr.bpl' [2021-07-09 18:33:57,332 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 18:33:57,334 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 18:33:57,334 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 18:33:57,334 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 18:33:57,335 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 18:33:57,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:33:57" (1/1) ... [2021-07-09 18:33:57,348 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:33:57" (1/1) ... [2021-07-09 18:33:57,353 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 18:33:57,355 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 18:33:57,355 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 18:33:57,356 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 18:33:57,361 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:33:57" (1/1) ... [2021-07-09 18:33:57,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:33:57" (1/1) ... [2021-07-09 18:33:57,362 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:33:57" (1/1) ... [2021-07-09 18:33:57,362 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:33:57" (1/1) ... [2021-07-09 18:33:57,366 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:33:57" (1/1) ... [2021-07-09 18:33:57,369 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:33:57" (1/1) ... [2021-07-09 18:33:57,369 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:33:57" (1/1) ... [2021-07-09 18:33:57,373 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 18:33:57,374 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 18:33:57,374 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 18:33:57,375 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 18:33:57,376 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:33:57" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:33:57,435 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 18:33:57,435 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 18:33:57,435 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 18:33:57,436 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 18:33:57,436 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 18:33:57,436 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 18:33:57,436 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 18:33:57,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 18:33:57,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 18:33:57,436 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 18:33:57,436 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 18:33:57,437 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 18:33:57,438 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 18:33:57,617 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 18:33:57,617 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 18:33:57,619 INFO L202 PluginConnector]: Adding new model min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:33:57 BoogieIcfgContainer [2021-07-09 18:33:57,619 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 18:33:57,620 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 18:33:57,620 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 18:33:57,622 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 18:33:57,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:33:57" (1/2) ... [2021-07-09 18:33:57,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7769fb10 and model type min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 06:33:57, skipping insertion in model container [2021-07-09 18:33:57,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:33:57" (2/2) ... [2021-07-09 18:33:57,623 INFO L111 eAbstractionObserver]: Analyzing ICFG min-fun.wvr.bpl [2021-07-09 18:33:57,626 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 18:33:57,627 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 18:33:57,627 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 18:33:57,627 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 18:33:57,651 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-09 18:33:57,665 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-09 18:33:57,679 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 18:33:57,679 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 18:33:57,679 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 18:33:57,679 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 18:33:57,680 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 18:33:57,680 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 18:33:57,680 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 18:33:57,680 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 18:33:57,686 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-07-09 18:33:57,709 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:57,711 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:57,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 18:33:57,717 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:57,718 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:57,718 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:57,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:57,721 INFO L82 PathProgramCache]: Analyzing trace with hash -234684100, now seen corresponding path program 1 times [2021-07-09 18:33:57,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:57,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627185784] [2021-07-09 18:33:57,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:57,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:57,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:57,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:57,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627185784] [2021-07-09 18:33:57,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627185784] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:33:57,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:33:57,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:33:57,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435125167] [2021-07-09 18:33:57,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 18:33:57,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:57,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 18:33:57,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:33:57,853 INFO L87 Difference]: Start difference. First operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:57,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:57,877 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-07-09 18:33:57,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:33:57,879 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 18:33:57,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:57,887 INFO L225 Difference]: With dead ends: 217 [2021-07-09 18:33:57,887 INFO L226 Difference]: Without dead ends: 202 [2021-07-09 18:33:57,888 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:33:57,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-07-09 18:33:57,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-07-09 18:33:57,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:57,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-07-09 18:33:57,922 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-07-09 18:33:57,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:57,923 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-07-09 18:33:57,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:57,923 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-07-09 18:33:57,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 18:33:57,925 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:57,927 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:57,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 18:33:57,928 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:57,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:57,929 INFO L82 PathProgramCache]: Analyzing trace with hash -433058596, now seen corresponding path program 1 times [2021-07-09 18:33:57,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:57,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397225060] [2021-07-09 18:33:57,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:57,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:57,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:33:57,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:57,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397225060] [2021-07-09 18:33:57,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397225060] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:33:57,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:33:57,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 18:33:57,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686757643] [2021-07-09 18:33:57,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:33:57,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:57,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:33:57,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:33:57,984 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:58,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:58,026 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-07-09 18:33:58,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:33:58,026 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 18:33:58,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:58,028 INFO L225 Difference]: With dead ends: 158 [2021-07-09 18:33:58,028 INFO L226 Difference]: Without dead ends: 158 [2021-07-09 18:33:58,028 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:33:58,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-07-09 18:33:58,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-07-09 18:33:58,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:58,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-07-09 18:33:58,037 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-07-09 18:33:58,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:58,037 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-07-09 18:33:58,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:58,037 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-07-09 18:33:58,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 18:33:58,038 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:58,038 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:58,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 18:33:58,039 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:58,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:58,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1176026010, now seen corresponding path program 1 times [2021-07-09 18:33:58,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:58,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889607157] [2021-07-09 18:33:58,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:58,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:58,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:33:58,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:58,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889607157] [2021-07-09 18:33:58,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889607157] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:33:58,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:33:58,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 18:33:58,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980831677] [2021-07-09 18:33:58,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:33:58,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:58,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:33:58,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:33:58,071 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:58,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:58,100 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-07-09 18:33:58,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:33:58,101 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 18:33:58,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:58,102 INFO L225 Difference]: With dead ends: 183 [2021-07-09 18:33:58,102 INFO L226 Difference]: Without dead ends: 183 [2021-07-09 18:33:58,103 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:33:58,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-07-09 18:33:58,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-07-09 18:33:58,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:58,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-07-09 18:33:58,113 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-07-09 18:33:58,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:58,113 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-07-09 18:33:58,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:58,113 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-07-09 18:33:58,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:33:58,114 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:58,115 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:58,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 18:33:58,115 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:58,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:58,115 INFO L82 PathProgramCache]: Analyzing trace with hash -483303622, now seen corresponding path program 1 times [2021-07-09 18:33:58,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:58,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150344585] [2021-07-09 18:33:58,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:58,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:58,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:58,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:58,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150344585] [2021-07-09 18:33:58,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150344585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:58,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005040151] [2021-07-09 18:33:58,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:58,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:58,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:33:58,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:58,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:58,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:58,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-07-09 18:33:58,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:58,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:58,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:58,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-09 18:33:58,929 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:58,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:58,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-09 18:33:58,934 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:58,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:58,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:33:58,947 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:97, output treesize:21 [2021-07-09 18:33:58,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:58,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005040151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:58,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:58,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:33:58,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988404978] [2021-07-09 18:33:58,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:33:58,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:58,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:33:58,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:33:58,984 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:59,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:59,184 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-07-09 18:33:59,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:33:59,185 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 18:33:59,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:59,186 INFO L225 Difference]: With dead ends: 330 [2021-07-09 18:33:59,187 INFO L226 Difference]: Without dead ends: 315 [2021-07-09 18:33:59,187 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 385.6ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:33:59,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-07-09 18:33:59,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-07-09 18:33:59,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:59,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-07-09 18:33:59,197 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-07-09 18:33:59,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:59,197 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-07-09 18:33:59,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:59,197 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-07-09 18:33:59,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:33:59,198 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:59,198 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:59,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:59,419 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:59,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:59,420 INFO L82 PathProgramCache]: Analyzing trace with hash -651112714, now seen corresponding path program 2 times [2021-07-09 18:33:59,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:59,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891304530] [2021-07-09 18:33:59,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:59,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:59,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:59,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:59,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891304530] [2021-07-09 18:33:59,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891304530] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:59,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298617797] [2021-07-09 18:33:59,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:59,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:33:59,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:59,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:33:59,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:59,897 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:59,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-09 18:33:59,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:59,914 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:33:59,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-07-09 18:33:59,916 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:59,924 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:33:59,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-07-09 18:33:59,933 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:59,943 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:59,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:33:59,945 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:59,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:59,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:33:59,997 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:133, output treesize:122 [2021-07-09 18:34:00,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:00,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298617797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:00,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:00,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-07-09 18:34:00,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164627677] [2021-07-09 18:34:00,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:34:00,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:00,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:34:00,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:34:00,157 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:00,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:00,611 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-07-09 18:34:00,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:34:00,612 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 18:34:00,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:00,616 INFO L225 Difference]: With dead ends: 374 [2021-07-09 18:34:00,616 INFO L226 Difference]: Without dead ends: 359 [2021-07-09 18:34:00,616 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 641.3ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:34:00,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-07-09 18:34:00,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-07-09 18:34:00,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:00,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-07-09 18:34:00,633 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-07-09 18:34:00,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:00,636 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-07-09 18:34:00,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:00,637 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-07-09 18:34:00,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:34:00,640 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:00,640 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:00,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-09 18:34:00,853 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:00,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:00,853 INFO L82 PathProgramCache]: Analyzing trace with hash -352339266, now seen corresponding path program 3 times [2021-07-09 18:34:00,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:00,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038523529] [2021-07-09 18:34:00,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:00,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:01,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:01,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:01,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038523529] [2021-07-09 18:34:01,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038523529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:01,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845427590] [2021-07-09 18:34:01,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:01,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:34:01,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:01,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:34:01,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:01,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:01,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:01,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-09 18:34:01,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:01,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:01,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 18:34:01,204 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:01,237 INFO L628 ElimStorePlain]: treesize reduction 35, result has 56.8 percent of original size [2021-07-09 18:34:01,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:01,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-09 18:34:01,241 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:01,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:01,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:34:01,256 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:121, output treesize:21 [2021-07-09 18:34:01,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:01,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845427590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:01,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:01,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 18:34:01,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981177965] [2021-07-09 18:34:01,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:34:01,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:01,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:34:01,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:34:01,290 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:01,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:01,442 INFO L93 Difference]: Finished difference Result 296 states and 831 transitions. [2021-07-09 18:34:01,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:34:01,442 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 18:34:01,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:01,444 INFO L225 Difference]: With dead ends: 296 [2021-07-09 18:34:01,444 INFO L226 Difference]: Without dead ends: 281 [2021-07-09 18:34:01,444 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 296.3ms TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:34:01,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-07-09 18:34:01,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-07-09 18:34:01,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:01,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-07-09 18:34:01,449 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-07-09 18:34:01,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:01,449 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-07-09 18:34:01,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:01,449 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-07-09 18:34:01,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:34:01,450 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:01,450 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:01,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-09 18:34:01,665 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:01,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:01,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1218486334, now seen corresponding path program 4 times [2021-07-09 18:34:01,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:01,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844209817] [2021-07-09 18:34:01,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:01,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:01,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:01,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:01,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844209817] [2021-07-09 18:34:01,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844209817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:01,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031269951] [2021-07-09 18:34:01,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:01,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:34:01,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:01,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:34:01,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:02,040 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:34:02,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-07-09 18:34:02,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:02,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:02,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:34:02,051 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:02,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:02,108 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:02,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-09 18:34:02,116 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:02,124 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:34:02,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-07-09 18:34:02,140 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:02,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:02,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:34:02,190 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:137, output treesize:98 [2021-07-09 18:34:02,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:02,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031269951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:02,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:02,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:34:02,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369731130] [2021-07-09 18:34:02,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:34:02,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:02,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:34:02,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:34:02,322 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:02,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:02,615 INFO L93 Difference]: Finished difference Result 409 states and 1185 transitions. [2021-07-09 18:34:02,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:34:02,615 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 18:34:02,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:02,617 INFO L225 Difference]: With dead ends: 409 [2021-07-09 18:34:02,617 INFO L226 Difference]: Without dead ends: 394 [2021-07-09 18:34:02,617 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 447.1ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:34:02,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-07-09 18:34:02,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 247. [2021-07-09 18:34:02,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:02,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-07-09 18:34:02,623 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-07-09 18:34:02,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:02,623 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-07-09 18:34:02,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:02,623 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-07-09 18:34:02,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:02,624 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:02,624 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:02,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:02,837 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:02,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:02,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1613936552, now seen corresponding path program 5 times [2021-07-09 18:34:02,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:02,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120363885] [2021-07-09 18:34:02,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:02,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:02,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:02,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:02,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120363885] [2021-07-09 18:34:02,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120363885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:02,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902467166] [2021-07-09 18:34:02,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:02,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:34:02,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:02,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:02,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:02,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:02,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902467166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:02,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:02,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:34:02,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777033632] [2021-07-09 18:34:02,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:34:02,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:02,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:34:02,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:34:02,976 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:03,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:03,335 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-07-09 18:34:03,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:34:03,335 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:34:03,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:03,338 INFO L225 Difference]: With dead ends: 619 [2021-07-09 18:34:03,338 INFO L226 Difference]: Without dead ends: 619 [2021-07-09 18:34:03,338 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 192.6ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:34:03,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-07-09 18:34:03,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-07-09 18:34:03,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:03,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-07-09 18:34:03,358 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-07-09 18:34:03,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:03,358 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-07-09 18:34:03,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:03,358 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-07-09 18:34:03,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:03,360 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:03,360 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:03,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-07-09 18:34:03,573 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:03,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:03,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1704711900, now seen corresponding path program 6 times [2021-07-09 18:34:03,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:03,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829678917] [2021-07-09 18:34:03,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:03,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:03,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:03,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:03,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829678917] [2021-07-09 18:34:03,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829678917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:03,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500047378] [2021-07-09 18:34:03,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:03,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:34:03,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:03,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:03,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:03,727 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:03,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500047378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:03,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:03,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:34:03,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13857916] [2021-07-09 18:34:03,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:34:03,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:03,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:34:03,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:34:03,729 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:04,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:04,395 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-07-09 18:34:04,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:34:04,395 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:34:04,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:04,399 INFO L225 Difference]: With dead ends: 1078 [2021-07-09 18:34:04,399 INFO L226 Difference]: Without dead ends: 1078 [2021-07-09 18:34:04,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 413.9ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:34:04,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-07-09 18:34:04,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-07-09 18:34:04,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:04,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-07-09 18:34:04,410 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-07-09 18:34:04,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:04,410 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-07-09 18:34:04,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:04,410 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-07-09 18:34:04,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:04,412 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:04,412 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:04,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:04,628 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:04,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:04,628 INFO L82 PathProgramCache]: Analyzing trace with hash -2023303316, now seen corresponding path program 7 times [2021-07-09 18:34:04,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:04,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557167327] [2021-07-09 18:34:04,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:04,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:04,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:04,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:04,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557167327] [2021-07-09 18:34:04,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557167327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:04,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460370350] [2021-07-09 18:34:04,671 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:04,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:04,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:04,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:04,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:04,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460370350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:04,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:04,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:34:04,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394130693] [2021-07-09 18:34:04,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:34:04,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:04,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:34:04,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:34:04,789 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:05,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:05,411 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-07-09 18:34:05,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:34:05,412 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:34:05,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:05,415 INFO L225 Difference]: With dead ends: 951 [2021-07-09 18:34:05,415 INFO L226 Difference]: Without dead ends: 951 [2021-07-09 18:34:05,416 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 382.1ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:34:05,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-07-09 18:34:05,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-07-09 18:34:05,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:05,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-07-09 18:34:05,424 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-07-09 18:34:05,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:05,424 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-07-09 18:34:05,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:05,424 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-07-09 18:34:05,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:05,425 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:05,425 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:05,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:05,641 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:05,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:05,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1087164644, now seen corresponding path program 1 times [2021-07-09 18:34:05,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:05,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047870240] [2021-07-09 18:34:05,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:05,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:05,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:34:05,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:05,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047870240] [2021-07-09 18:34:05,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047870240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:05,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544500635] [2021-07-09 18:34:05,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:05,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:05,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:34:05,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:05,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:34:05,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544500635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:05,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:05,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-09 18:34:05,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424583202] [2021-07-09 18:34:05,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:34:05,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:05,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:34:05,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:34:05,759 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:05,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:05,866 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-07-09 18:34:05,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:34:05,866 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:34:05,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:05,870 INFO L225 Difference]: With dead ends: 669 [2021-07-09 18:34:05,870 INFO L226 Difference]: Without dead ends: 663 [2021-07-09 18:34:05,870 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:34:05,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-07-09 18:34:05,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-07-09 18:34:05,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:05,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-07-09 18:34:05,880 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-07-09 18:34:05,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:05,880 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-07-09 18:34:05,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:05,880 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-07-09 18:34:05,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:05,881 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:05,881 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:06,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-09 18:34:06,093 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:06,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:06,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1524133352, now seen corresponding path program 8 times [2021-07-09 18:34:06,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:06,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758684943] [2021-07-09 18:34:06,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:06,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:06,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:06,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:06,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758684943] [2021-07-09 18:34:06,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758684943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:06,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960720860] [2021-07-09 18:34:06,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:06,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:34:06,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:06,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:06,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:06,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:06,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960720860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:06,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:06,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 18:34:06,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110764438] [2021-07-09 18:34:06,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:34:06,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:06,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:34:06,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:34:06,246 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:06,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:06,400 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-07-09 18:34:06,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:34:06,400 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:34:06,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:06,403 INFO L225 Difference]: With dead ends: 710 [2021-07-09 18:34:06,403 INFO L226 Difference]: Without dead ends: 672 [2021-07-09 18:34:06,403 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 134.7ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:34:06,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-07-09 18:34:06,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-07-09 18:34:06,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:06,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-07-09 18:34:06,421 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-07-09 18:34:06,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:06,421 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-07-09 18:34:06,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:06,421 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-07-09 18:34:06,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:06,422 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:06,422 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:06,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:06,638 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:06,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:06,639 INFO L82 PathProgramCache]: Analyzing trace with hash 2064876612, now seen corresponding path program 2 times [2021-07-09 18:34:06,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:06,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956870132] [2021-07-09 18:34:06,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:06,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:06,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:34:06,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:06,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956870132] [2021-07-09 18:34:06,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956870132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:06,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769642901] [2021-07-09 18:34:06,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:06,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:34:06,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:06,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:34:06,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:06,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:34:06,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769642901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:06,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:06,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-09 18:34:06,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837722635] [2021-07-09 18:34:06,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:34:06,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:06,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:34:06,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:34:06,731 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:06,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:06,813 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-07-09 18:34:06,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:34:06,813 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:34:06,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:06,816 INFO L225 Difference]: With dead ends: 830 [2021-07-09 18:34:06,816 INFO L226 Difference]: Without dead ends: 830 [2021-07-09 18:34:06,816 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 55.2ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:34:06,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-07-09 18:34:06,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-07-09 18:34:06,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:06,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-07-09 18:34:06,829 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-07-09 18:34:06,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:06,829 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-07-09 18:34:06,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:06,829 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-07-09 18:34:06,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:06,830 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:06,830 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:07,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:07,049 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:07,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:07,049 INFO L82 PathProgramCache]: Analyzing trace with hash 718195046, now seen corresponding path program 9 times [2021-07-09 18:34:07,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:07,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743943630] [2021-07-09 18:34:07,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:07,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:07,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:07,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743943630] [2021-07-09 18:34:07,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743943630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:07,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674124872] [2021-07-09 18:34:07,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:07,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:34:07,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:07,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:07,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:07,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:07,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674124872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:07,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:07,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:34:07,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803869925] [2021-07-09 18:34:07,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:34:07,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:07,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:34:07,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:34:07,183 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:07,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:07,439 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-07-09 18:34:07,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:34:07,439 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:34:07,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:07,444 INFO L225 Difference]: With dead ends: 1196 [2021-07-09 18:34:07,444 INFO L226 Difference]: Without dead ends: 1196 [2021-07-09 18:34:07,444 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 153.3ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:34:07,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-07-09 18:34:07,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-07-09 18:34:07,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:07,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-07-09 18:34:07,458 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-07-09 18:34:07,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:07,458 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-07-09 18:34:07,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:07,458 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-07-09 18:34:07,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:07,459 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:07,459 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:07,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-07-09 18:34:07,673 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:07,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:07,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1503109140, now seen corresponding path program 10 times [2021-07-09 18:34:07,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:07,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584011949] [2021-07-09 18:34:07,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:07,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:07,720 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:07,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:07,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584011949] [2021-07-09 18:34:07,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584011949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:07,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281127379] [2021-07-09 18:34:07,721 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:07,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:34:07,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:07,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:07,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:07,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:07,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281127379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:07,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:07,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:34:07,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287168876] [2021-07-09 18:34:07,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:34:07,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:07,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:34:07,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:34:07,808 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:08,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:08,154 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-07-09 18:34:08,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:34:08,155 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:34:08,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:08,160 INFO L225 Difference]: With dead ends: 1492 [2021-07-09 18:34:08,160 INFO L226 Difference]: Without dead ends: 1492 [2021-07-09 18:34:08,160 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 229.5ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:34:08,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-07-09 18:34:08,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-07-09 18:34:08,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:08,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-07-09 18:34:08,177 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-07-09 18:34:08,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:08,177 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-07-09 18:34:08,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:08,177 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-07-09 18:34:08,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:08,178 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:08,178 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:08,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-09 18:34:08,393 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:08,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:08,393 INFO L82 PathProgramCache]: Analyzing trace with hash 420086484, now seen corresponding path program 11 times [2021-07-09 18:34:08,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:08,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504637000] [2021-07-09 18:34:08,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:08,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:08,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:08,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:08,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504637000] [2021-07-09 18:34:08,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504637000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:08,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772823933] [2021-07-09 18:34:08,422 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:08,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:34:08,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:08,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:08,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:08,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:08,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772823933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:08,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:08,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 18:34:08,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959334524] [2021-07-09 18:34:08,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:34:08,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:08,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:34:08,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:34:08,512 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:08,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:08,736 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-07-09 18:34:08,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:34:08,736 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:34:08,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:08,740 INFO L225 Difference]: With dead ends: 1258 [2021-07-09 18:34:08,740 INFO L226 Difference]: Without dead ends: 1248 [2021-07-09 18:34:08,741 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 150.0ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:34:08,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-07-09 18:34:08,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-07-09 18:34:08,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:08,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-07-09 18:34:08,755 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-07-09 18:34:08,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:08,755 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-07-09 18:34:08,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:08,755 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-07-09 18:34:08,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:08,756 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:08,757 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:08,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-07-09 18:34:08,973 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:08,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:08,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1891164602, now seen corresponding path program 12 times [2021-07-09 18:34:08,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:08,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381174947] [2021-07-09 18:34:08,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:08,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:09,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:09,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:09,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381174947] [2021-07-09 18:34:09,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381174947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:09,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777773542] [2021-07-09 18:34:09,017 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:09,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:34:09,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:09,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:09,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:09,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:09,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777773542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:09,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:09,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 18:34:09,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569747085] [2021-07-09 18:34:09,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:34:09,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:09,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:34:09,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:34:09,118 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:09,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:09,370 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-07-09 18:34:09,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:34:09,370 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:34:09,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:09,375 INFO L225 Difference]: With dead ends: 1329 [2021-07-09 18:34:09,375 INFO L226 Difference]: Without dead ends: 1329 [2021-07-09 18:34:09,375 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 177.9ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:34:09,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-07-09 18:34:09,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-07-09 18:34:09,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:09,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-07-09 18:34:09,389 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-07-09 18:34:09,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:09,389 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-07-09 18:34:09,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:09,389 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-07-09 18:34:09,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:09,391 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:09,391 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:09,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:09,607 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:09,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:09,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1458287998, now seen corresponding path program 13 times [2021-07-09 18:34:09,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:09,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570671694] [2021-07-09 18:34:09,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:09,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:09,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:09,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:09,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570671694] [2021-07-09 18:34:09,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570671694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:09,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516790272] [2021-07-09 18:34:09,643 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:09,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:09,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:09,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:09,719 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:09,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516790272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:09,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:09,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:34:09,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598947402] [2021-07-09 18:34:09,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:34:09,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:09,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:34:09,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:34:09,720 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:10,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:10,001 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-07-09 18:34:10,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:34:10,004 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:34:10,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:10,010 INFO L225 Difference]: With dead ends: 1548 [2021-07-09 18:34:10,010 INFO L226 Difference]: Without dead ends: 1544 [2021-07-09 18:34:10,010 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 174.9ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:34:10,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-07-09 18:34:10,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-07-09 18:34:10,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:10,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-07-09 18:34:10,027 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-07-09 18:34:10,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:10,027 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-07-09 18:34:10,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:10,027 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-07-09 18:34:10,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:10,028 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:10,028 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:10,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:10,246 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:10,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:10,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1186278808, now seen corresponding path program 14 times [2021-07-09 18:34:10,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:10,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210999217] [2021-07-09 18:34:10,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:10,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:10,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:10,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:10,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210999217] [2021-07-09 18:34:10,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210999217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:10,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058506708] [2021-07-09 18:34:10,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:10,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:34:10,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:10,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:10,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:10,407 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:10,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058506708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:10,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:10,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:34:10,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362276826] [2021-07-09 18:34:10,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:34:10,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:10,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:34:10,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:34:10,409 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:11,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:11,077 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-07-09 18:34:11,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:34:11,077 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:34:11,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:11,102 INFO L225 Difference]: With dead ends: 2734 [2021-07-09 18:34:11,102 INFO L226 Difference]: Without dead ends: 2734 [2021-07-09 18:34:11,103 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 391.1ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:34:11,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-07-09 18:34:11,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-07-09 18:34:11,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:11,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-07-09 18:34:11,128 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-07-09 18:34:11,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:11,128 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-07-09 18:34:11,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:11,128 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-07-09 18:34:11,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:11,130 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:11,130 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:11,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:11,333 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:11,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:11,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1753230888, now seen corresponding path program 15 times [2021-07-09 18:34:11,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:11,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724865391] [2021-07-09 18:34:11,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:11,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:11,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:11,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:11,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724865391] [2021-07-09 18:34:11,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724865391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:11,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855337180] [2021-07-09 18:34:11,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:11,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:34:11,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:11,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:11,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:11,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:11,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855337180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:11,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:11,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:34:11,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008695959] [2021-07-09 18:34:11,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:34:11,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:11,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:34:11,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:34:11,478 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:12,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:12,150 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-07-09 18:34:12,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:34:12,150 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:34:12,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:12,156 INFO L225 Difference]: With dead ends: 2693 [2021-07-09 18:34:12,157 INFO L226 Difference]: Without dead ends: 2693 [2021-07-09 18:34:12,157 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 409.1ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:34:12,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-07-09 18:34:12,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-07-09 18:34:12,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:12,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-07-09 18:34:12,183 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-07-09 18:34:12,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:12,183 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-07-09 18:34:12,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:12,183 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-07-09 18:34:12,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:12,184 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:12,184 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:12,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-07-09 18:34:12,387 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:12,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:12,387 INFO L82 PathProgramCache]: Analyzing trace with hash 580885030, now seen corresponding path program 16 times [2021-07-09 18:34:12,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:12,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999815794] [2021-07-09 18:34:12,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:12,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:12,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:12,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:12,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999815794] [2021-07-09 18:34:12,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999815794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:12,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177342801] [2021-07-09 18:34:12,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:12,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:34:12,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:12,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:12,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:12,514 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:12,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177342801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:12,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:12,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:34:12,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005459222] [2021-07-09 18:34:12,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:34:12,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:12,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:34:12,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:34:12,515 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:13,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:13,112 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-07-09 18:34:13,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:34:13,112 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:34:13,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:13,118 INFO L225 Difference]: With dead ends: 2677 [2021-07-09 18:34:13,118 INFO L226 Difference]: Without dead ends: 2677 [2021-07-09 18:34:13,119 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 346.9ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:34:13,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-07-09 18:34:13,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-07-09 18:34:13,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:13,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-07-09 18:34:13,144 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-07-09 18:34:13,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:13,144 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-07-09 18:34:13,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:13,144 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-07-09 18:34:13,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:13,146 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:13,146 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:13,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-09 18:34:13,363 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:13,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:13,363 INFO L82 PathProgramCache]: Analyzing trace with hash 662261118, now seen corresponding path program 17 times [2021-07-09 18:34:13,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:13,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457636922] [2021-07-09 18:34:13,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:13,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:13,396 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:13,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:13,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457636922] [2021-07-09 18:34:13,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457636922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:13,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310555132] [2021-07-09 18:34:13,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:13,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:34:13,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:13,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:13,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:13,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:13,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310555132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:13,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:13,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:34:13,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773412738] [2021-07-09 18:34:13,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:34:13,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:13,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:34:13,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:34:13,493 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:14,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:14,010 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-07-09 18:34:14,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:34:14,010 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:34:14,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:14,015 INFO L225 Difference]: With dead ends: 2474 [2021-07-09 18:34:14,015 INFO L226 Difference]: Without dead ends: 2470 [2021-07-09 18:34:14,015 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 290.8ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:34:14,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-07-09 18:34:14,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-07-09 18:34:14,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:14,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-07-09 18:34:14,038 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-07-09 18:34:14,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:14,039 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-07-09 18:34:14,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:14,039 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-07-09 18:34:14,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:14,040 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:14,040 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:14,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-09 18:34:14,256 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:14,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:14,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1592918334, now seen corresponding path program 18 times [2021-07-09 18:34:14,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:14,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330960955] [2021-07-09 18:34:14,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:14,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:14,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:14,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:14,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330960955] [2021-07-09 18:34:14,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330960955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:14,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171466107] [2021-07-09 18:34:14,287 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:14,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:34:14,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:14,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:14,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:14,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:14,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171466107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:14,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:14,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:34:14,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765605931] [2021-07-09 18:34:14,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:34:14,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:14,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:34:14,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:34:14,414 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:15,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:15,034 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-07-09 18:34:15,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:34:15,035 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:34:15,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:15,040 INFO L225 Difference]: With dead ends: 2514 [2021-07-09 18:34:15,040 INFO L226 Difference]: Without dead ends: 2514 [2021-07-09 18:34:15,040 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 363.6ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:34:15,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-07-09 18:34:15,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-07-09 18:34:15,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:15,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-07-09 18:34:15,063 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-07-09 18:34:15,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:15,063 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-07-09 18:34:15,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:15,063 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-07-09 18:34:15,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:15,065 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:15,065 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:15,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-09 18:34:15,281 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:15,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:15,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1059009808, now seen corresponding path program 19 times [2021-07-09 18:34:15,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:15,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362026812] [2021-07-09 18:34:15,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:15,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:15,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:15,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:15,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362026812] [2021-07-09 18:34:15,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362026812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:15,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256278370] [2021-07-09 18:34:15,309 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:15,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:15,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:15,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:15,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:15,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256278370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:15,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:15,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:34:15,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479132564] [2021-07-09 18:34:15,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:34:15,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:15,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:34:15,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:34:15,425 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:16,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:16,000 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-07-09 18:34:16,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:34:16,001 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:34:16,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:16,006 INFO L225 Difference]: With dead ends: 2332 [2021-07-09 18:34:16,006 INFO L226 Difference]: Without dead ends: 2328 [2021-07-09 18:34:16,006 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 316.2ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:34:16,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-07-09 18:34:16,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-07-09 18:34:16,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:16,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-07-09 18:34:16,044 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-07-09 18:34:16,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:16,045 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-07-09 18:34:16,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:16,045 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-07-09 18:34:16,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:16,046 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:16,047 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:16,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-09 18:34:16,259 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:16,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:16,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1971295360, now seen corresponding path program 3 times [2021-07-09 18:34:16,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:16,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303669337] [2021-07-09 18:34:16,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:16,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:16,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:34:16,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:16,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303669337] [2021-07-09 18:34:16,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303669337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:16,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321060287] [2021-07-09 18:34:16,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:16,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:34:16,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:16,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:34:16,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:16,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:34:16,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321060287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:16,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:16,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-09 18:34:16,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022342955] [2021-07-09 18:34:16,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:34:16,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:16,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:34:16,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:34:16,350 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:16,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:16,415 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-07-09 18:34:16,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:34:16,415 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:34:16,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:16,417 INFO L225 Difference]: With dead ends: 929 [2021-07-09 18:34:16,417 INFO L226 Difference]: Without dead ends: 929 [2021-07-09 18:34:16,417 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:34:16,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-07-09 18:34:16,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-07-09 18:34:16,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:16,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-07-09 18:34:16,429 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-07-09 18:34:16,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:16,429 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-07-09 18:34:16,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:16,429 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-07-09 18:34:16,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:16,431 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:16,431 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:16,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:16,645 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:16,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:16,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1041095616, now seen corresponding path program 20 times [2021-07-09 18:34:16,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:16,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679678058] [2021-07-09 18:34:16,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:16,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:16,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:16,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:16,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679678058] [2021-07-09 18:34:16,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679678058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:16,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163849844] [2021-07-09 18:34:16,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:16,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:34:16,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:16,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:16,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:16,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:16,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163849844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:16,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:16,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-09 18:34:16,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291239752] [2021-07-09 18:34:16,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:34:16,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:16,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:34:16,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:34:16,750 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:17,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:17,015 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-07-09 18:34:17,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:34:17,016 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:34:17,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:17,026 INFO L225 Difference]: With dead ends: 1555 [2021-07-09 18:34:17,026 INFO L226 Difference]: Without dead ends: 1555 [2021-07-09 18:34:17,026 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 141.0ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:34:17,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-07-09 18:34:17,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-07-09 18:34:17,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:17,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-07-09 18:34:17,043 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-07-09 18:34:17,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:17,043 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-07-09 18:34:17,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:17,043 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-07-09 18:34:17,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:17,044 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:17,045 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:17,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:17,253 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:17,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:17,253 INFO L82 PathProgramCache]: Analyzing trace with hash 861583836, now seen corresponding path program 21 times [2021-07-09 18:34:17,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:17,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196001511] [2021-07-09 18:34:17,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:17,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:17,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:17,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:17,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196001511] [2021-07-09 18:34:17,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196001511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:17,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302721774] [2021-07-09 18:34:17,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:17,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:34:17,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:17,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:17,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:17,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:17,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302721774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:17,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:17,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 18:34:17,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629245694] [2021-07-09 18:34:17,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:34:17,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:17,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:34:17,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:34:17,355 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:17,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:17,588 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-07-09 18:34:17,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:34:17,588 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:34:17,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:17,592 INFO L225 Difference]: With dead ends: 1605 [2021-07-09 18:34:17,592 INFO L226 Difference]: Without dead ends: 1605 [2021-07-09 18:34:17,592 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 132.7ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:34:17,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-07-09 18:34:17,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-07-09 18:34:17,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:17,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-07-09 18:34:17,609 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-07-09 18:34:17,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:17,609 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-07-09 18:34:17,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:17,609 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-07-09 18:34:17,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:17,610 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:17,610 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:17,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:17,825 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:17,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:17,825 INFO L82 PathProgramCache]: Analyzing trace with hash 816762694, now seen corresponding path program 22 times [2021-07-09 18:34:17,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:17,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534494820] [2021-07-09 18:34:17,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:17,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:17,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:34:17,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:17,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534494820] [2021-07-09 18:34:17,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534494820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:17,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464565876] [2021-07-09 18:34:17,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:17,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:34:17,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:17,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:17,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:17,915 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:34:17,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464565876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:17,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:17,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 18:34:17,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089817270] [2021-07-09 18:34:17,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:34:17,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:17,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:34:17,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:34:17,916 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:18,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:18,084 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-07-09 18:34:18,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:34:18,085 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:34:18,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:18,087 INFO L225 Difference]: With dead ends: 1524 [2021-07-09 18:34:18,088 INFO L226 Difference]: Without dead ends: 1520 [2021-07-09 18:34:18,088 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 94.0ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:34:18,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-07-09 18:34:18,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-07-09 18:34:18,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:18,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-07-09 18:34:18,103 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-07-09 18:34:18,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:18,103 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-07-09 18:34:18,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:18,103 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-07-09 18:34:18,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:18,105 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:18,105 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:18,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-07-09 18:34:18,320 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:18,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:18,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1414099352, now seen corresponding path program 23 times [2021-07-09 18:34:18,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:18,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323205390] [2021-07-09 18:34:18,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:18,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:18,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:18,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323205390] [2021-07-09 18:34:18,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323205390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:18,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889112219] [2021-07-09 18:34:18,347 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:18,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:34:18,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:18,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:18,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:18,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:18,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889112219] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:18,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:18,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-09 18:34:18,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057582981] [2021-07-09 18:34:18,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:34:18,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:18,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:34:18,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:34:18,422 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:18,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:18,626 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-07-09 18:34:18,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:34:18,626 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:34:18,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:18,629 INFO L225 Difference]: With dead ends: 1508 [2021-07-09 18:34:18,629 INFO L226 Difference]: Without dead ends: 1496 [2021-07-09 18:34:18,630 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 119.3ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:34:18,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-07-09 18:34:18,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-07-09 18:34:18,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:18,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-07-09 18:34:18,645 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-07-09 18:34:18,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:18,645 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-07-09 18:34:18,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:18,645 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-07-09 18:34:18,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:18,647 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:18,647 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:18,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:18,861 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:18,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:18,861 INFO L82 PathProgramCache]: Analyzing trace with hash 887679068, now seen corresponding path program 24 times [2021-07-09 18:34:18,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:18,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267470548] [2021-07-09 18:34:18,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:18,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:18,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:18,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:18,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267470548] [2021-07-09 18:34:18,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267470548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:18,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454002979] [2021-07-09 18:34:18,891 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:18,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:34:18,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:18,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:18,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:18,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:18,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454002979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:18,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:18,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:34:18,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60645030] [2021-07-09 18:34:18,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:34:18,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:18,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:34:18,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:34:18,995 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:19,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:19,461 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-07-09 18:34:19,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:34:19,461 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:34:19,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:19,465 INFO L225 Difference]: With dead ends: 2412 [2021-07-09 18:34:19,466 INFO L226 Difference]: Without dead ends: 2412 [2021-07-09 18:34:19,466 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 298.2ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:34:19,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-07-09 18:34:19,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-07-09 18:34:19,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:19,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-07-09 18:34:19,487 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-07-09 18:34:19,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:19,487 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-07-09 18:34:19,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:19,487 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-07-09 18:34:19,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:19,488 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:19,488 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:19,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-07-09 18:34:19,697 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:19,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:19,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1454631148, now seen corresponding path program 25 times [2021-07-09 18:34:19,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:19,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878345647] [2021-07-09 18:34:19,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:19,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:19,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:19,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:19,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878345647] [2021-07-09 18:34:19,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878345647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:19,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119499337] [2021-07-09 18:34:19,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:19,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:19,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:19,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:19,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:19,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119499337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:19,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:19,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:34:19,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898282977] [2021-07-09 18:34:19,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:34:19,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:19,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:34:19,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:34:19,838 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:20,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:20,260 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-07-09 18:34:20,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:34:20,261 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:34:20,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:20,265 INFO L225 Difference]: With dead ends: 2335 [2021-07-09 18:34:20,265 INFO L226 Difference]: Without dead ends: 2335 [2021-07-09 18:34:20,266 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 290.0ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:34:20,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-07-09 18:34:20,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-07-09 18:34:20,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:20,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-07-09 18:34:20,287 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-07-09 18:34:20,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:20,287 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-07-09 18:34:20,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:20,287 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-07-09 18:34:20,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:20,289 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:20,289 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:20,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:20,505 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:20,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:20,505 INFO L82 PathProgramCache]: Analyzing trace with hash 282285290, now seen corresponding path program 26 times [2021-07-09 18:34:20,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:20,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440552084] [2021-07-09 18:34:20,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:20,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:20,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:20,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:20,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440552084] [2021-07-09 18:34:20,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440552084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:20,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368978486] [2021-07-09 18:34:20,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:20,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:34:20,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:20,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:20,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:20,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:20,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368978486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:20,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:20,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:34:20,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075274881] [2021-07-09 18:34:20,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:34:20,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:20,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:34:20,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:34:20,650 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:21,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:21,023 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-07-09 18:34:21,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:34:21,025 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:34:21,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:21,029 INFO L225 Difference]: With dead ends: 2285 [2021-07-09 18:34:21,029 INFO L226 Difference]: Without dead ends: 2285 [2021-07-09 18:34:21,029 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 229.0ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:34:21,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-07-09 18:34:21,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-07-09 18:34:21,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:21,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-07-09 18:34:21,051 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-07-09 18:34:21,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:21,051 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-07-09 18:34:21,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:21,051 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-07-09 18:34:21,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:21,053 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:21,053 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:21,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-07-09 18:34:21,269 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:21,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:21,269 INFO L82 PathProgramCache]: Analyzing trace with hash 363661378, now seen corresponding path program 27 times [2021-07-09 18:34:21,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:21,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087598596] [2021-07-09 18:34:21,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:21,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:21,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:21,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:21,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087598596] [2021-07-09 18:34:21,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087598596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:21,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347294055] [2021-07-09 18:34:21,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:21,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:34:21,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:21,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:21,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:21,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:21,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347294055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:21,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:21,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:34:21,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897969820] [2021-07-09 18:34:21,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:34:21,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:21,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:34:21,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:34:21,387 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:21,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:21,742 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-07-09 18:34:21,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:34:21,742 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:34:21,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:21,746 INFO L225 Difference]: With dead ends: 2176 [2021-07-09 18:34:21,746 INFO L226 Difference]: Without dead ends: 2172 [2021-07-09 18:34:21,746 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 217.2ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:34:21,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-07-09 18:34:21,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-07-09 18:34:21,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:21,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-07-09 18:34:21,766 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-07-09 18:34:21,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:21,766 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-07-09 18:34:21,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:21,766 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-07-09 18:34:21,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:21,767 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:21,767 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:21,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:21,983 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:21,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:21,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1294318594, now seen corresponding path program 28 times [2021-07-09 18:34:21,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:21,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268642415] [2021-07-09 18:34:21,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:21,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:22,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:22,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:22,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268642415] [2021-07-09 18:34:22,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268642415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:22,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414926729] [2021-07-09 18:34:22,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:22,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:34:22,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:22,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:22,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:22,111 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:22,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414926729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:22,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:22,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:34:22,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424721644] [2021-07-09 18:34:22,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:34:22,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:22,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:34:22,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:34:22,112 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:22,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:22,455 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-07-09 18:34:22,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:34:22,456 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:34:22,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:22,459 INFO L225 Difference]: With dead ends: 2199 [2021-07-09 18:34:22,459 INFO L226 Difference]: Without dead ends: 2199 [2021-07-09 18:34:22,459 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 223.2ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:34:22,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-07-09 18:34:22,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-07-09 18:34:22,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:22,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-07-09 18:34:22,478 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-07-09 18:34:22,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:22,478 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-07-09 18:34:22,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:22,478 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-07-09 18:34:22,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:22,479 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:22,479 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:22,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-07-09 18:34:22,681 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:22,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:22,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1357609548, now seen corresponding path program 29 times [2021-07-09 18:34:22,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:22,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478396734] [2021-07-09 18:34:22,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:22,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:22,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:22,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:22,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478396734] [2021-07-09 18:34:22,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478396734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:22,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271310514] [2021-07-09 18:34:22,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:22,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:34:22,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:22,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:22,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:22,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:22,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271310514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:22,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:22,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:34:22,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550519657] [2021-07-09 18:34:22,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:34:22,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:22,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:34:22,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:34:22,814 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:23,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:23,150 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-07-09 18:34:23,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:34:23,151 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:34:23,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:23,154 INFO L225 Difference]: With dead ends: 2156 [2021-07-09 18:34:23,154 INFO L226 Difference]: Without dead ends: 2152 [2021-07-09 18:34:23,154 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 205.7ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:34:23,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-07-09 18:34:23,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-07-09 18:34:23,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:23,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-07-09 18:34:23,172 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-07-09 18:34:23,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:23,172 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-07-09 18:34:23,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:23,172 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-07-09 18:34:23,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:23,174 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:23,174 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:23,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-09 18:34:23,390 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:23,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:23,390 INFO L82 PathProgramCache]: Analyzing trace with hash -354181564, now seen corresponding path program 30 times [2021-07-09 18:34:23,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:23,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414232785] [2021-07-09 18:34:23,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:23,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:23,417 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:23,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:23,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414232785] [2021-07-09 18:34:23,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414232785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:23,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438904759] [2021-07-09 18:34:23,417 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:23,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:34:23,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:23,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:23,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:23,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:23,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438904759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:23,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:23,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:34:23,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722357972] [2021-07-09 18:34:23,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:34:23,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:23,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:34:23,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:34:23,494 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:23,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:23,805 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-07-09 18:34:23,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:34:23,806 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:34:23,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:23,809 INFO L225 Difference]: With dead ends: 2097 [2021-07-09 18:34:23,809 INFO L226 Difference]: Without dead ends: 2097 [2021-07-09 18:34:23,809 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 185.5ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:34:23,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-07-09 18:34:23,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-07-09 18:34:23,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:23,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-07-09 18:34:23,828 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-07-09 18:34:23,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:23,828 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-07-09 18:34:23,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:23,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-07-09 18:34:23,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:23,830 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:23,830 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:24,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:24,030 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:24,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:24,031 INFO L82 PathProgramCache]: Analyzing trace with hash -272805476, now seen corresponding path program 31 times [2021-07-09 18:34:24,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:24,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711802531] [2021-07-09 18:34:24,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:24,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:24,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:24,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:24,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711802531] [2021-07-09 18:34:24,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711802531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:24,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230660030] [2021-07-09 18:34:24,061 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:24,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:24,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:24,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:24,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:24,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230660030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:24,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:24,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:34:24,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655431980] [2021-07-09 18:34:24,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:34:24,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:24,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:34:24,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:34:24,131 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:24,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:24,378 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-07-09 18:34:24,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:34:24,378 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:34:24,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:24,381 INFO L225 Difference]: With dead ends: 1963 [2021-07-09 18:34:24,381 INFO L226 Difference]: Without dead ends: 1959 [2021-07-09 18:34:24,381 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 145.2ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:34:24,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-07-09 18:34:24,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-07-09 18:34:24,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:24,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-07-09 18:34:24,416 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-07-09 18:34:24,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:24,416 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-07-09 18:34:24,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:24,416 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-07-09 18:34:24,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:24,418 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:24,418 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:24,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:24,632 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:24,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:24,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1787897448, now seen corresponding path program 32 times [2021-07-09 18:34:24,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:24,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10908542] [2021-07-09 18:34:24,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:24,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:24,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:24,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:24,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10908542] [2021-07-09 18:34:24,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10908542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:24,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700224945] [2021-07-09 18:34:24,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:24,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:34:24,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:24,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:24,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:24,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:24,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700224945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:24,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:24,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:34:24,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256484108] [2021-07-09 18:34:24,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:34:24,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:24,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:34:24,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:34:24,730 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:24,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:24,907 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-07-09 18:34:24,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:34:24,907 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:34:24,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:24,910 INFO L225 Difference]: With dead ends: 1728 [2021-07-09 18:34:24,910 INFO L226 Difference]: Without dead ends: 1716 [2021-07-09 18:34:24,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 109.7ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:34:24,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-07-09 18:34:24,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-07-09 18:34:24,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:24,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-07-09 18:34:24,926 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-07-09 18:34:24,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:24,926 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-07-09 18:34:24,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:24,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-07-09 18:34:24,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:24,927 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:24,927 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:25,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:25,132 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:25,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:25,132 INFO L82 PathProgramCache]: Analyzing trace with hash -190770732, now seen corresponding path program 33 times [2021-07-09 18:34:25,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:25,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394751121] [2021-07-09 18:34:25,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:25,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:25,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:25,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:25,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394751121] [2021-07-09 18:34:25,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394751121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:25,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627517099] [2021-07-09 18:34:25,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:25,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:34:25,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:25,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:25,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:25,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:25,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627517099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:25,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:25,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:34:25,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407347641] [2021-07-09 18:34:25,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:34:25,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:25,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:34:25,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:34:25,252 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:25,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:25,578 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-07-09 18:34:25,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:34:25,578 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:34:25,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:25,581 INFO L225 Difference]: With dead ends: 1821 [2021-07-09 18:34:25,581 INFO L226 Difference]: Without dead ends: 1821 [2021-07-09 18:34:25,581 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 194.8ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:34:25,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-07-09 18:34:25,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-07-09 18:34:25,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:25,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-07-09 18:34:25,599 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-07-09 18:34:25,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:25,599 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-07-09 18:34:25,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:25,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-07-09 18:34:25,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:25,601 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:25,601 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:25,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:25,817 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:25,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:25,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1452268422, now seen corresponding path program 34 times [2021-07-09 18:34:25,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:25,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704091368] [2021-07-09 18:34:25,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:25,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:25,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:25,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:25,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704091368] [2021-07-09 18:34:25,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704091368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:25,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457770126] [2021-07-09 18:34:25,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:25,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:34:25,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:25,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:25,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:25,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:25,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457770126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:25,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:25,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:34:25,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430477371] [2021-07-09 18:34:25,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:34:25,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:25,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:34:25,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:34:25,926 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:26,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:26,179 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-07-09 18:34:26,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:34:26,179 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:34:26,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:26,182 INFO L225 Difference]: With dead ends: 1790 [2021-07-09 18:34:26,182 INFO L226 Difference]: Without dead ends: 1786 [2021-07-09 18:34:26,182 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 147.6ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:34:26,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-07-09 18:34:26,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-07-09 18:34:26,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:26,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-07-09 18:34:26,199 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-07-09 18:34:26,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:26,200 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-07-09 18:34:26,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:26,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-07-09 18:34:26,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:26,201 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:26,201 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:26,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-07-09 18:34:26,402 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:26,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:26,402 INFO L82 PathProgramCache]: Analyzing trace with hash 184811244, now seen corresponding path program 35 times [2021-07-09 18:34:26,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:26,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019718225] [2021-07-09 18:34:26,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:26,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:26,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:26,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:26,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019718225] [2021-07-09 18:34:26,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019718225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:26,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251882585] [2021-07-09 18:34:26,431 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:26,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:34:26,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:26,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:26,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:26,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:26,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251882585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:26,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:26,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:34:26,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988781294] [2021-07-09 18:34:26,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:34:26,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:26,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:34:26,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:34:26,506 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:26,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:26,664 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-07-09 18:34:26,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:34:26,665 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:34:26,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:26,667 INFO L225 Difference]: With dead ends: 1649 [2021-07-09 18:34:26,667 INFO L226 Difference]: Without dead ends: 1637 [2021-07-09 18:34:26,667 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:34:26,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-07-09 18:34:26,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-07-09 18:34:26,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:26,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-07-09 18:34:26,683 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-07-09 18:34:26,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:26,683 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-07-09 18:34:26,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:26,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-07-09 18:34:26,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:34:26,685 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:26,685 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:26,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:26,901 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:26,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:26,901 INFO L82 PathProgramCache]: Analyzing trace with hash -998684486, now seen corresponding path program 4 times [2021-07-09 18:34:26,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:26,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889304026] [2021-07-09 18:34:26,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:26,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:27,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:27,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:27,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889304026] [2021-07-09 18:34:27,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889304026] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:27,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318416902] [2021-07-09 18:34:27,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:27,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:34:27,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:27,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:34:27,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:27,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:27,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:27,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:27,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:34:27,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:27,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:27,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:27,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:27,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:34:27,826 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:27,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:27,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:27,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:27,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:34:27,832 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:27,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:27,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:27,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:27,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:34:27,838 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:27,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:27,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:27,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:27,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:34:27,844 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:27,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:27,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:27,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:27,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:34:27,850 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:27,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:27,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:27,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:27,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-09 18:34:27,856 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:27,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:27,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:27,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:27,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:34:27,862 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:27,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:27,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:27,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:27,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:34:27,868 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:27,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:27,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:27,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:27,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:34:27,873 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:27,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:27,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:27,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:27,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:34:27,879 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:27,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:27,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:27,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:27,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:34:27,885 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:27,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:27,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:27,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:27,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:34:27,891 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:27,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:27,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:27,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:27,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:34:27,896 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:27,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:27,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:27,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:34:27,900 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:27,970 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-09 18:34:27,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:34:27,972 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-09 18:34:28,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:28,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318416902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:28,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:28,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:34:28,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773016496] [2021-07-09 18:34:28,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:34:28,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:28,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:34:28,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:34:28,024 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:28,648 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2021-07-09 18:34:28,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:28,895 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-07-09 18:34:28,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:34:28,895 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:34:28,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:28,897 INFO L225 Difference]: With dead ends: 1517 [2021-07-09 18:34:28,897 INFO L226 Difference]: Without dead ends: 1502 [2021-07-09 18:34:28,898 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1194.7ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:34:28,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-07-09 18:34:28,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-07-09 18:34:28,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:28,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-07-09 18:34:28,923 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-07-09 18:34:28,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:28,923 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-07-09 18:34:28,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:28,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-07-09 18:34:28,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:34:28,925 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:28,925 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:29,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-07-09 18:34:29,126 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:29,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:29,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1267884794, now seen corresponding path program 5 times [2021-07-09 18:34:29,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:29,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345928864] [2021-07-09 18:34:29,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:29,730 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-07-09 18:34:29,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:29,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:29,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345928864] [2021-07-09 18:34:29,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345928864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:29,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706967980] [2021-07-09 18:34:29,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:29,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:34:29,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:29,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:34:29,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:30,243 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-07-09 18:34:30,289 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_5, v_prenex_7], 3=[v_prenex_9, A]} [2021-07-09 18:34:30,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:30,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:34:30,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:30,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:30,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:34:30,302 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:30,413 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-07-09 18:34:30,413 INFO L628 ElimStorePlain]: treesize reduction 119, result has 50.4 percent of original size [2021-07-09 18:34:30,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:30,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:34:30,418 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:30,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:30,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:30,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-09 18:34:30,461 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:30,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:30,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:30,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:34:30,512 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:30,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:30,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:34:30,546 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:281, output treesize:56 [2021-07-09 18:34:30,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:30,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706967980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:30,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:30,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:34:30,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992068314] [2021-07-09 18:34:30,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:34:30,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:30,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:34:30,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:34:30,637 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:31,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:31,447 INFO L93 Difference]: Finished difference Result 1495 states and 4899 transitions. [2021-07-09 18:34:31,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:34:31,447 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:34:31,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:31,449 INFO L225 Difference]: With dead ends: 1495 [2021-07-09 18:34:31,450 INFO L226 Difference]: Without dead ends: 1480 [2021-07-09 18:34:31,450 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1441.0ms TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:34:31,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-07-09 18:34:31,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1150. [2021-07-09 18:34:31,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.3568320278503045) internal successors, (3857), 1149 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:31,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-07-09 18:34:31,479 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-07-09 18:34:31,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:31,481 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-07-09 18:34:31,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:31,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-07-09 18:34:31,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:34:31,483 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:31,483 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:31,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:31,698 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:31,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:31,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1435653194, now seen corresponding path program 36 times [2021-07-09 18:34:31,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:31,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379924277] [2021-07-09 18:34:31,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:31,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:32,215 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:32,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:32,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379924277] [2021-07-09 18:34:32,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379924277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:32,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636452494] [2021-07-09 18:34:32,216 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:32,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:34:32,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:32,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:34:32,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:32,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:32,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:32,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-09 18:34:32,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:32,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:32,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:32,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:34:32,820 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:32,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:32,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:32,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:34:32,829 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:32,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:32,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:32,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:34:32,838 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:32,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:32,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:32,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:34:32,846 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:32,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:32,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:32,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:34:32,855 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:32,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:32,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:32,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-09 18:34:32,864 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:32,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:32,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:32,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:34:32,872 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:32,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:32,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:32,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:34:32,881 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:32,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:32,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:32,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:34:32,890 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:32,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:32,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:32,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-09 18:34:32,900 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:32,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:32,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:32,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-09 18:34:32,909 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:32,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:32,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:32,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-09 18:34:32,918 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:32,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:32,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:32,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:34:32,926 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:32,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:32,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:32,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:32,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:34:32,931 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:32,967 INFO L628 ElimStorePlain]: treesize reduction 34, result has 44.3 percent of original size [2021-07-09 18:34:32,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:34:32,969 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-09 18:34:33,001 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:33,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636452494] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:33,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:33,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-09 18:34:33,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824054291] [2021-07-09 18:34:33,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:34:33,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:33,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:34:33,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:34:33,003 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:34,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:34,411 INFO L93 Difference]: Finished difference Result 1607 states and 5192 transitions. [2021-07-09 18:34:34,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:34:34,412 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:34:34,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:34,414 INFO L225 Difference]: With dead ends: 1607 [2021-07-09 18:34:34,414 INFO L226 Difference]: Without dead ends: 1592 [2021-07-09 18:34:34,415 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1657.7ms TimeCoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:34:34,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2021-07-09 18:34:34,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1180. [2021-07-09 18:34:34,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.340966921119593) internal successors, (3939), 1179 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:34,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-07-09 18:34:34,430 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-07-09 18:34:34,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:34,431 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-07-09 18:34:34,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:34,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-07-09 18:34:34,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:34:34,432 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:34,432 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:34,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-07-09 18:34:34,633 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:34,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:34,633 INFO L82 PathProgramCache]: Analyzing trace with hash -630606018, now seen corresponding path program 6 times [2021-07-09 18:34:34,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:34,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932443629] [2021-07-09 18:34:34,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:34,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:35,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:35,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:35,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932443629] [2021-07-09 18:34:35,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932443629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:35,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575017972] [2021-07-09 18:34:35,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:35,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:34:35,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:35,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:34:35,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:35,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:35,355 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:35,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:34:35,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:35,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:35,363 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:35,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:34:35,363 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:35,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:35,371 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:35,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:34:35,372 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:35,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:35,381 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:35,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:34:35,383 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:35,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:35,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:35,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:34:35,399 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:35,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:35,409 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:35,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:34:35,410 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:35,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:35,417 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:35,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:34:35,418 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:35,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:35,428 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:35,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:34:35,430 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:35,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:35,438 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:35,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-09 18:34:35,438 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:35,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:35,447 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:35,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:34:35,452 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:35,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:35,461 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:35,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:34:35,461 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:35,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:35,469 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:35,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:34:35,469 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:35,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:35,479 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:34:35,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:34:35,481 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:35,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:35,492 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:34:35,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:34:35,494 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:35,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:35,504 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:34:35,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:34:35,505 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:35,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:35,510 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:35,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:34:35,511 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:35,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:35,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:34:35,591 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-07-09 18:34:35,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:35,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575017972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:35,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:35,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:34:35,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086113682] [2021-07-09 18:34:35,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:34:35,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:35,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:34:35,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:34:35,794 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:36,174 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2021-07-09 18:34:36,836 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 48 [2021-07-09 18:34:37,391 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2021-07-09 18:34:37,532 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-07-09 18:34:37,734 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-07-09 18:34:37,980 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 68 [2021-07-09 18:34:38,126 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-07-09 18:34:38,414 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-07-09 18:34:38,708 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-07-09 18:34:38,977 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 42 [2021-07-09 18:34:39,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:39,038 INFO L93 Difference]: Finished difference Result 1842 states and 5907 transitions. [2021-07-09 18:34:39,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:34:39,038 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:34:39,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:39,041 INFO L225 Difference]: With dead ends: 1842 [2021-07-09 18:34:39,041 INFO L226 Difference]: Without dead ends: 1827 [2021-07-09 18:34:39,042 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 3167.2ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:34:39,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2021-07-09 18:34:39,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1198. [2021-07-09 18:34:39,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.346700083542189) internal successors, (4006), 1197 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:39,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4006 transitions. [2021-07-09 18:34:39,059 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4006 transitions. Word has length 26 [2021-07-09 18:34:39,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:39,059 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 4006 transitions. [2021-07-09 18:34:39,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:39,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4006 transitions. [2021-07-09 18:34:39,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:34:39,061 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:39,061 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:39,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:39,262 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:39,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:39,262 INFO L82 PathProgramCache]: Analyzing trace with hash 919775546, now seen corresponding path program 37 times [2021-07-09 18:34:39,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:39,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639104409] [2021-07-09 18:34:39,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:39,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:39,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:39,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:39,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639104409] [2021-07-09 18:34:39,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639104409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:39,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442767598] [2021-07-09 18:34:39,659 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:39,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:39,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:34:39,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:40,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-07-09 18:34:40,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:40,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-07-09 18:34:40,227 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:40,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:34:40,237 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:40,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-09 18:34:40,244 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:40,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:34:40,252 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:40,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-07-09 18:34:40,261 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:40,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-07-09 18:34:40,269 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:40,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:34:40,288 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:40,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-07-09 18:34:40,296 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:40,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-07-09 18:34:40,304 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:40,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:34:40,312 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:40,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-07-09 18:34:40,321 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:40,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:34:40,329 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:40,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-07-09 18:34:40,337 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:40,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-07-09 18:34:40,344 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:40,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-07-09 18:34:40,350 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:40,380 INFO L628 ElimStorePlain]: treesize reduction 20, result has 64.9 percent of original size [2021-07-09 18:34:40,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:34:40,381 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:27 [2021-07-09 18:34:40,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:40,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442767598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:40,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:40,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 18:34:40,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889312488] [2021-07-09 18:34:40,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:34:40,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:40,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:34:40,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:34:40,411 INFO L87 Difference]: Start difference. First operand 1198 states and 4006 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:40,770 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 40 [2021-07-09 18:34:41,488 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 44 [2021-07-09 18:34:41,634 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 56 [2021-07-09 18:34:41,818 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 44 [2021-07-09 18:34:41,963 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 47 [2021-07-09 18:34:42,410 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 51 [2021-07-09 18:34:42,841 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2021-07-09 18:34:42,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:42,971 INFO L93 Difference]: Finished difference Result 1797 states and 5747 transitions. [2021-07-09 18:34:42,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:34:42,972 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:34:42,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:42,974 INFO L225 Difference]: With dead ends: 1797 [2021-07-09 18:34:42,974 INFO L226 Difference]: Without dead ends: 1782 [2021-07-09 18:34:42,975 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 2574.9ms TimeCoverageRelationStatistics Valid=356, Invalid=1624, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:34:42,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1782 states. [2021-07-09 18:34:42,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1782 to 1206. [2021-07-09 18:34:42,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 3.349377593360996) internal successors, (4036), 1205 states have internal predecessors, (4036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:42,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 4036 transitions. [2021-07-09 18:34:42,991 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 4036 transitions. Word has length 26 [2021-07-09 18:34:42,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:42,991 INFO L482 AbstractCegarLoop]: Abstraction has 1206 states and 4036 transitions. [2021-07-09 18:34:42,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:42,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 4036 transitions. [2021-07-09 18:34:42,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:34:42,993 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:42,993 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:43,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-07-09 18:34:43,193 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:43,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:43,194 INFO L82 PathProgramCache]: Analyzing trace with hash -56543298, now seen corresponding path program 38 times [2021-07-09 18:34:43,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:43,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256239944] [2021-07-09 18:34:43,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:43,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:43,698 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:43,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:43,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256239944] [2021-07-09 18:34:43,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256239944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:43,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004630577] [2021-07-09 18:34:43,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:43,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:34:43,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:43,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:34:43,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:44,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:44,404 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-07-09 18:34:44,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 51 [2021-07-09 18:34:44,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:44,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:44,458 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-07-09 18:34:44,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 51 [2021-07-09 18:34:44,467 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:44,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:44,514 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-07-09 18:34:44,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 44 [2021-07-09 18:34:44,521 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:44,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:44,541 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-09 18:34:44,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-07-09 18:34:44,542 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:44,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:44,581 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-07-09 18:34:44,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 44 [2021-07-09 18:34:44,592 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:44,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:44,639 INFO L354 Elim1Store]: treesize reduction 21, result has 53.3 percent of original size [2021-07-09 18:34:44,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 42 [2021-07-09 18:34:44,643 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:44,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:44,664 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-09 18:34:44,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 1 [2021-07-09 18:34:44,665 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:44,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:44,715 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-07-09 18:34:44,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 55 [2021-07-09 18:34:44,726 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:44,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:44,770 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-07-09 18:34:44,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 44 [2021-07-09 18:34:44,776 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:44,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:44,796 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-09 18:34:44,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 1 [2021-07-09 18:34:44,797 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:44,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:44,816 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-09 18:34:44,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 1 [2021-07-09 18:34:44,818 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:44,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:44,857 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-07-09 18:34:44,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 44 [2021-07-09 18:34:44,865 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:44,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:44,882 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-09 18:34:44,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 1 [2021-07-09 18:34:44,883 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:44,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:44,901 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-09 18:34:44,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-07-09 18:34:44,901 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:44,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:44,945 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-07-09 18:34:44,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 49 [2021-07-09 18:34:44,955 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:44,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:44,967 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-09 18:34:44,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 1 [2021-07-09 18:34:44,968 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:45,271 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-07-09 18:34:45,271 INFO L628 ElimStorePlain]: treesize reduction 109, result has 76.9 percent of original size [2021-07-09 18:34:45,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:34:45,280 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:993, output treesize:437 [2021-07-09 18:34:45,536 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-07-09 18:34:45,702 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-07-09 18:34:45,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:45,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004630577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:45,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:45,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 18:34:45,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137251120] [2021-07-09 18:34:45,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:34:45,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:45,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:34:45,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:34:45,737 INFO L87 Difference]: Start difference. First operand 1206 states and 4036 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:47,358 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 59 [2021-07-09 18:34:47,503 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-07-09 18:34:47,696 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 48 [2021-07-09 18:34:48,138 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 74 [2021-07-09 18:34:48,653 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 76 [2021-07-09 18:34:49,004 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 74 [2021-07-09 18:34:49,152 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-07-09 18:34:49,304 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-07-09 18:34:49,689 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 67 [2021-07-09 18:34:50,048 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 68 [2021-07-09 18:34:50,248 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 46 [2021-07-09 18:34:50,500 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-07-09 18:34:50,706 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-07-09 18:34:50,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:50,936 INFO L93 Difference]: Finished difference Result 2305 states and 7128 transitions. [2021-07-09 18:34:50,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:34:50,937 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:34:50,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:50,940 INFO L225 Difference]: With dead ends: 2305 [2021-07-09 18:34:50,940 INFO L226 Difference]: Without dead ends: 2260 [2021-07-09 18:34:50,941 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 5474.5ms TimeCoverageRelationStatistics Valid=600, Invalid=2940, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:34:50,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2021-07-09 18:34:50,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 1349. [2021-07-09 18:34:50,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 3.306379821958457) internal successors, (4457), 1348 states have internal predecessors, (4457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:50,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 4457 transitions. [2021-07-09 18:34:50,961 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 4457 transitions. Word has length 26 [2021-07-09 18:34:50,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:50,961 INFO L482 AbstractCegarLoop]: Abstraction has 1349 states and 4457 transitions. [2021-07-09 18:34:50,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:50,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 4457 transitions. [2021-07-09 18:34:50,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:34:50,963 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:50,963 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:51,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:51,163 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:51,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:51,164 INFO L82 PathProgramCache]: Analyzing trace with hash -2141610526, now seen corresponding path program 7 times [2021-07-09 18:34:51,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:51,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613794330] [2021-07-09 18:34:51,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:51,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:51,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:51,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:51,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613794330] [2021-07-09 18:34:51,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613794330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:51,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643794388] [2021-07-09 18:34:51,629 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:51,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:51,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:34:51,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:52,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:52,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:52,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:52,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:34:52,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:52,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:52,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:52,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:52,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:34:52,036 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:52,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:52,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:52,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:52,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:34:52,041 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:52,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:52,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:52,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:52,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:34:52,046 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:52,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:52,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:52,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:52,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:34:52,052 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:52,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:52,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:52,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:52,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:34:52,057 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:52,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:52,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:52,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:52,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:34:52,063 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:52,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:52,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:52,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:52,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:34:52,068 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:52,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:52,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:52,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:52,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:34:52,073 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:52,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:52,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:52,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:52,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:34:52,079 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:52,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:52,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:52,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:52,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:34:52,085 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:52,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:52,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:52,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:52,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:34:52,091 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:52,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:52,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:52,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:52,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-09 18:34:52,097 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:52,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:52,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:52,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:52,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:34:52,103 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:52,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:52,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:52,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:34:52,107 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:52,179 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-09 18:34:52,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:34:52,181 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-09 18:34:52,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:52,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643794388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:52,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:52,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:34:52,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257210292] [2021-07-09 18:34:52,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:34:52,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:52,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:34:52,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:34:52,229 INFO L87 Difference]: Start difference. First operand 1349 states and 4457 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:53,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:53,191 INFO L93 Difference]: Finished difference Result 1744 states and 5646 transitions. [2021-07-09 18:34:53,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:34:53,192 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:34:53,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:53,194 INFO L225 Difference]: With dead ends: 1744 [2021-07-09 18:34:53,195 INFO L226 Difference]: Without dead ends: 1729 [2021-07-09 18:34:53,195 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1263.7ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:34:53,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2021-07-09 18:34:53,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1360. [2021-07-09 18:34:53,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1359 states have (on average 3.3038999264164826) internal successors, (4490), 1359 states have internal predecessors, (4490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:53,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 4490 transitions. [2021-07-09 18:34:53,213 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 4490 transitions. Word has length 26 [2021-07-09 18:34:53,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:53,213 INFO L482 AbstractCegarLoop]: Abstraction has 1360 states and 4490 transitions. [2021-07-09 18:34:53,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:53,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 4490 transitions. [2021-07-09 18:34:53,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:34:53,215 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:53,215 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:53,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-07-09 18:34:53,426 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:53,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:53,427 INFO L82 PathProgramCache]: Analyzing trace with hash 124958754, now seen corresponding path program 8 times [2021-07-09 18:34:53,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:53,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399501940] [2021-07-09 18:34:53,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:53,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:54,034 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-07-09 18:34:54,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:54,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:54,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399501940] [2021-07-09 18:34:54,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399501940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:54,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173120179] [2021-07-09 18:34:54,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:54,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:34:54,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:54,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:34:54,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:54,420 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-07-09 18:34:54,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:54,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:54,542 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-07-09 18:34:54,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 22 [2021-07-09 18:34:54,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:54,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:54,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:54,571 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-09 18:34:54,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 30 [2021-07-09 18:34:54,573 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:54,952 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 130 [2021-07-09 18:34:54,953 INFO L628 ElimStorePlain]: treesize reduction 403, result has 46.9 percent of original size [2021-07-09 18:34:54,970 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:54,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-09 18:34:54,975 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:55,099 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-07-09 18:34:55,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:55,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:55,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:55,119 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:55,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 37 [2021-07-09 18:34:55,122 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:55,247 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-07-09 18:34:55,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:55,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:55,270 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-09 18:34:55,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-07-09 18:34:55,274 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:55,398 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-07-09 18:34:55,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:55,416 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:34:55,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:34:55,417 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:55,535 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-07-09 18:34:55,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:55,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:55,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:55,554 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-09 18:34:55,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 26 [2021-07-09 18:34:55,555 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:55,669 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-07-09 18:34:55,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:55,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:55,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:55,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-07-09 18:34:55,686 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:55,808 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-07-09 18:34:55,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:55,824 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:34:55,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:34:55,828 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:55,939 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-07-09 18:34:55,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:55,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:34:55,953 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 16 variables, input treesize:825, output treesize:551 [2021-07-09 18:34:56,217 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-07-09 18:34:56,408 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-07-09 18:34:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:56,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173120179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:56,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:56,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:34:56,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008816804] [2021-07-09 18:34:56,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:34:56,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:56,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:34:56,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:34:56,513 INFO L87 Difference]: Start difference. First operand 1360 states and 4490 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:57,441 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2021-07-09 18:34:57,811 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 60 [2021-07-09 18:34:58,044 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 46 [2021-07-09 18:34:58,351 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 59 [2021-07-09 18:34:58,691 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-07-09 18:34:59,153 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2021-07-09 18:34:59,557 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2021-07-09 18:34:59,908 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2021-07-09 18:35:00,056 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-07-09 18:35:00,309 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2021-07-09 18:35:00,645 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2021-07-09 18:35:01,059 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2021-07-09 18:35:01,288 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 43 [2021-07-09 18:35:01,781 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 74 [2021-07-09 18:35:01,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:01,875 INFO L93 Difference]: Finished difference Result 2016 states and 6372 transitions. [2021-07-09 18:35:01,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:35:01,876 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:35:01,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:01,880 INFO L225 Difference]: With dead ends: 2016 [2021-07-09 18:35:01,880 INFO L226 Difference]: Without dead ends: 2001 [2021-07-09 18:35:01,880 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 5863.8ms TimeCoverageRelationStatistics Valid=329, Invalid=1833, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:35:01,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2001 states. [2021-07-09 18:35:01,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2001 to 1371. [2021-07-09 18:35:01,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1371 states, 1370 states have (on average 3.3124087591240876) internal successors, (4538), 1370 states have internal predecessors, (4538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:01,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 4538 transitions. [2021-07-09 18:35:01,902 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 4538 transitions. Word has length 26 [2021-07-09 18:35:01,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:01,902 INFO L482 AbstractCegarLoop]: Abstraction has 1371 states and 4538 transitions. [2021-07-09 18:35:01,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:01,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 4538 transitions. [2021-07-09 18:35:01,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:35:01,904 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:01,904 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:02,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable518 [2021-07-09 18:35:02,108 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:02,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:02,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1812450954, now seen corresponding path program 9 times [2021-07-09 18:35:02,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:02,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853749151] [2021-07-09 18:35:02,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:02,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:02,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:02,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:02,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853749151] [2021-07-09 18:35:02,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853749151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:02,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060930571] [2021-07-09 18:35:02,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:02,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:35:02,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:02,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:35:02,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:02,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:02,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:02,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:02,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:35:02,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:02,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:02,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:02,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:02,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:35:02,866 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:02,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:02,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:02,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:02,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:35:02,871 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:02,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:02,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:02,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:02,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:35:02,877 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:02,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:02,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:02,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:02,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:35:02,883 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:02,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:02,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:02,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:02,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:35:02,889 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:02,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:02,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:02,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:02,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:35:02,895 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:02,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:02,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:02,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:02,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:35:02,901 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:02,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:02,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:02,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:02,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:35:02,906 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:02,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:02,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:02,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:02,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:35:02,911 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:02,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:02,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:02,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:02,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:35:02,917 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:02,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:02,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:02,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:02,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:35:02,923 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:02,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:02,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:02,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:02,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-09 18:35:02,929 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:02,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:02,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:02,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:02,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:35:02,935 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:02,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:02,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:02,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:35:02,939 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:03,015 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-09 18:35:03,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:35:03,017 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-09 18:35:03,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:03,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060930571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:03,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:03,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:35:03,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875563256] [2021-07-09 18:35:03,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:35:03,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:03,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:35:03,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:35:03,065 INFO L87 Difference]: Start difference. First operand 1371 states and 4538 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:04,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:04,308 INFO L93 Difference]: Finished difference Result 1859 states and 6002 transitions. [2021-07-09 18:35:04,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:35:04,309 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:35:04,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:04,328 INFO L225 Difference]: With dead ends: 1859 [2021-07-09 18:35:04,328 INFO L226 Difference]: Without dead ends: 1844 [2021-07-09 18:35:04,328 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1428.1ms TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:35:04,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-07-09 18:35:04,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1380. [2021-07-09 18:35:04,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.3168963016678754) internal successors, (4574), 1379 states have internal predecessors, (4574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:04,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 4574 transitions. [2021-07-09 18:35:04,347 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 4574 transitions. Word has length 26 [2021-07-09 18:35:04,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:04,347 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 4574 transitions. [2021-07-09 18:35:04,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:04,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 4574 transitions. [2021-07-09 18:35:04,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:35:04,349 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:04,349 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:04,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable567,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:04,565 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:04,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:04,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1980260046, now seen corresponding path program 10 times [2021-07-09 18:35:04,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:04,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516149962] [2021-07-09 18:35:04,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:04,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:04,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:04,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:04,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516149962] [2021-07-09 18:35:04,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516149962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:04,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287872341] [2021-07-09 18:35:04,998 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:05,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:35:05,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:05,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:35:05,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:05,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:35:05,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:05,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:35:05,375 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:05,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:35:05,381 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:05,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:35:05,386 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:05,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:35:05,393 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:05,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:35:05,399 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:05,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:35:05,405 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:05,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:35:05,410 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:05,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:35:05,415 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:05,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:35:05,421 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:05,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:35:05,427 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:05,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:35:05,433 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:05,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:35:05,438 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:05,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:35:05,444 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:05,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-09 18:35:05,448 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:05,518 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-09 18:35:05,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:35:05,520 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-09 18:35:05,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:05,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287872341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:05,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:05,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:35:05,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242054435] [2021-07-09 18:35:05,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:35:05,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:05,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:35:05,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:35:05,576 INFO L87 Difference]: Start difference. First operand 1380 states and 4574 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:06,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:06,210 INFO L93 Difference]: Finished difference Result 1722 states and 5631 transitions. [2021-07-09 18:35:06,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:35:06,211 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:35:06,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:06,214 INFO L225 Difference]: With dead ends: 1722 [2021-07-09 18:35:06,214 INFO L226 Difference]: Without dead ends: 1707 [2021-07-09 18:35:06,214 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 981.2ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:35:06,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-07-09 18:35:06,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1380. [2021-07-09 18:35:06,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.3168963016678754) internal successors, (4574), 1379 states have internal predecessors, (4574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:06,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 4574 transitions. [2021-07-09 18:35:06,231 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 4574 transitions. Word has length 26 [2021-07-09 18:35:06,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:06,231 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 4574 transitions. [2021-07-09 18:35:06,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:06,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 4574 transitions. [2021-07-09 18:35:06,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:35:06,233 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:06,233 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:06,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable599 [2021-07-09 18:35:06,434 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:06,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:06,434 INFO L82 PathProgramCache]: Analyzing trace with hash 247191222, now seen corresponding path program 11 times [2021-07-09 18:35:06,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:06,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997085394] [2021-07-09 18:35:06,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:06,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:06,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:06,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:06,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997085394] [2021-07-09 18:35:06,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997085394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:06,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346434837] [2021-07-09 18:35:06,804 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:06,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:35:06,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:06,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:35:06,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:07,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:07,168 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:35:07,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:35:07,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:07,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:07,180 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:35:07,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:35:07,182 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:07,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:07,190 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:07,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:35:07,190 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:07,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:07,207 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:07,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:35:07,208 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:07,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:07,216 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:07,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:35:07,217 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:07,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:07,228 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:07,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:35:07,229 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:07,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:07,241 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:07,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:35:07,244 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:07,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:07,255 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:07,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:35:07,259 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:07,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:07,268 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:07,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:35:07,269 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:07,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:07,280 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:07,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:35:07,283 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:07,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:07,292 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:07,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:35:07,293 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:07,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:07,301 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:07,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:35:07,302 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:07,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:07,312 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:35:07,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:35:07,313 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:07,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:07,323 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:07,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:35:07,324 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:07,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:07,332 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:07,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-09 18:35:07,333 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:07,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:07,341 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:07,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:35:07,342 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:07,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:07,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:35:07,423 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:657, output treesize:174 [2021-07-09 18:35:07,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:07,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346434837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:07,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:07,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:35:07,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291094886] [2021-07-09 18:35:07,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:35:07,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:07,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:35:07,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:35:07,619 INFO L87 Difference]: Start difference. First operand 1380 states and 4574 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:08,073 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 39 [2021-07-09 18:35:08,276 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2021-07-09 18:35:08,742 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 49 [2021-07-09 18:35:09,158 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 50 [2021-07-09 18:35:10,005 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-07-09 18:35:10,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:10,254 INFO L93 Difference]: Finished difference Result 2174 states and 6962 transitions. [2021-07-09 18:35:10,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:35:10,254 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:35:10,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:10,257 INFO L225 Difference]: With dead ends: 2174 [2021-07-09 18:35:10,257 INFO L226 Difference]: Without dead ends: 2144 [2021-07-09 18:35:10,258 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 2645.8ms TimeCoverageRelationStatistics Valid=323, Invalid=1569, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:35:10,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2021-07-09 18:35:10,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 1380. [2021-07-09 18:35:10,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.3168963016678754) internal successors, (4574), 1379 states have internal predecessors, (4574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:10,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 4574 transitions. [2021-07-09 18:35:10,279 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 4574 transitions. Word has length 26 [2021-07-09 18:35:10,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:10,279 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 4574 transitions. [2021-07-09 18:35:10,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:10,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 4574 transitions. [2021-07-09 18:35:10,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:35:10,281 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:10,281 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:10,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-07-09 18:35:10,482 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:10,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:10,482 INFO L82 PathProgramCache]: Analyzing trace with hash 317421942, now seen corresponding path program 12 times [2021-07-09 18:35:10,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:10,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149356194] [2021-07-09 18:35:10,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:10,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:10,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:10,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:10,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149356194] [2021-07-09 18:35:10,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149356194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:10,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421012610] [2021-07-09 18:35:10,915 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:10,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:35:10,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:10,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:35:10,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:11,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:11,177 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:11,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:35:11,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:11,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:11,185 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:11,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:35:11,186 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:11,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:11,194 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:11,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:35:11,194 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:11,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:11,204 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:11,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:35:11,206 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:11,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:11,216 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:11,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:35:11,219 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:11,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:11,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:11,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:35:11,232 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:11,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:11,241 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:11,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:35:11,241 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:11,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:11,254 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:11,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:35:11,256 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:11,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:11,266 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:11,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-09 18:35:11,267 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:11,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:11,279 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:11,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:35:11,283 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:11,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:11,293 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:11,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:35:11,293 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:11,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:11,301 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:11,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:35:11,302 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:11,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:11,312 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:35:11,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:35:11,313 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:11,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:11,325 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:35:11,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:35:11,329 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:11,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:11,339 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:35:11,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:35:11,349 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:11,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:11,356 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:11,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:35:11,357 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:11,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:11,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:35:11,426 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-07-09 18:35:11,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:11,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421012610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:11,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:11,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:35:11,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184134806] [2021-07-09 18:35:11,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:35:11,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:11,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:35:11,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:35:11,612 INFO L87 Difference]: Start difference. First operand 1380 states and 4574 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:12,048 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 49 [2021-07-09 18:35:12,748 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 48 [2021-07-09 18:35:13,203 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 49 [2021-07-09 18:35:13,561 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 61 [2021-07-09 18:35:13,706 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-07-09 18:35:13,981 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-07-09 18:35:14,314 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 55 [2021-07-09 18:35:14,581 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 41 [2021-07-09 18:35:14,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:14,637 INFO L93 Difference]: Finished difference Result 1982 states and 6430 transitions. [2021-07-09 18:35:14,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:35:14,638 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:35:14,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:14,641 INFO L225 Difference]: With dead ends: 1982 [2021-07-09 18:35:14,641 INFO L226 Difference]: Without dead ends: 1967 [2021-07-09 18:35:14,642 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 3188.1ms TimeCoverageRelationStatistics Valid=326, Invalid=1480, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:35:14,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2021-07-09 18:35:14,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1380. [2021-07-09 18:35:14,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.3168963016678754) internal successors, (4574), 1379 states have internal predecessors, (4574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:14,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 4574 transitions. [2021-07-09 18:35:14,663 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 4574 transitions. Word has length 26 [2021-07-09 18:35:14,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:14,663 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 4574 transitions. [2021-07-09 18:35:14,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:14,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 4574 transitions. [2021-07-09 18:35:14,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:35:14,665 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:14,665 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:14,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable672 [2021-07-09 18:35:14,866 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:14,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:14,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1219202938, now seen corresponding path program 39 times [2021-07-09 18:35:14,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:14,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312882426] [2021-07-09 18:35:14,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:14,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:15,352 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:15,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:15,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312882426] [2021-07-09 18:35:15,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312882426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:15,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053394030] [2021-07-09 18:35:15,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:15,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:35:15,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:15,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:35:15,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:15,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:15,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:15,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:15,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:15,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:15,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:15,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-09 18:35:15,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:15,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:15,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:15,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:15,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:15,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:15,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:15,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:35:15,921 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:15,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:15,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:15,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:15,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:15,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:15,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:15,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-09 18:35:15,929 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:15,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:15,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:15,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:15,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:15,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:15,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:15,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:35:15,949 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:15,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:15,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:15,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:15,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:15,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:15,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:15,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:35:15,958 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:15,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:15,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:15,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:15,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:15,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:15,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:15,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:35:15,967 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:15,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:15,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:15,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:15,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:15,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:15,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:15,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:35:15,975 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:15,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:15,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:15,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:15,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:15,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:15,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:15,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-09 18:35:15,982 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:15,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:15,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:15,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:15,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:15,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:15,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:15,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:35:15,991 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:15,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:15,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:15,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:15,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:15,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:15,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:15,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:35:15,999 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:16,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:16,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:16,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:16,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:16,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:16,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:16,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-09 18:35:16,006 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:16,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:16,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:16,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:16,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:16,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:16,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:16,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:35:16,014 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:16,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:16,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:16,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:16,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:16,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:16,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:16,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-09 18:35:16,022 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:16,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:16,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:16,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:16,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:16,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:16,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:16,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:35:16,028 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:16,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:16,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:16,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:16,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:16,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:35:16,033 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:16,056 INFO L628 ElimStorePlain]: treesize reduction 34, result has 44.3 percent of original size [2021-07-09 18:35:16,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:35:16,057 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-09 18:35:16,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:16,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053394030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:16,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:16,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-09 18:35:16,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489978990] [2021-07-09 18:35:16,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:35:16,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:16,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:35:16,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:35:16,093 INFO L87 Difference]: Start difference. First operand 1380 states and 4574 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:16,499 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2021-07-09 18:35:16,990 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2021-07-09 18:35:17,597 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2021-07-09 18:35:17,929 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 56 [2021-07-09 18:35:18,086 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2021-07-09 18:35:18,544 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 67 [2021-07-09 18:35:19,743 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 47 [2021-07-09 18:35:20,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:20,414 INFO L93 Difference]: Finished difference Result 3227 states and 9972 transitions. [2021-07-09 18:35:20,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:35:20,414 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:35:20,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:20,419 INFO L225 Difference]: With dead ends: 3227 [2021-07-09 18:35:20,419 INFO L226 Difference]: Without dead ends: 3182 [2021-07-09 18:35:20,420 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 4153.9ms TimeCoverageRelationStatistics Valid=669, Invalid=3363, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:35:20,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2021-07-09 18:35:20,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 1395. [2021-07-09 18:35:20,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 1394 states have (on average 3.33142037302726) internal successors, (4644), 1394 states have internal predecessors, (4644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:20,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 4644 transitions. [2021-07-09 18:35:20,445 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 4644 transitions. Word has length 26 [2021-07-09 18:35:20,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:20,445 INFO L482 AbstractCegarLoop]: Abstraction has 1395 states and 4644 transitions. [2021-07-09 18:35:20,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:20,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 4644 transitions. [2021-07-09 18:35:20,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:35:20,447 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:20,447 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:20,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable689 [2021-07-09 18:35:20,648 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:20,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:20,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1873451990, now seen corresponding path program 40 times [2021-07-09 18:35:20,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:20,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451316202] [2021-07-09 18:35:20,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:20,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:21,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:21,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:21,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451316202] [2021-07-09 18:35:21,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451316202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:21,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318629905] [2021-07-09 18:35:21,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:21,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:35:21,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:21,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:35:21,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:21,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:21,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:35:21,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:21,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:21,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:35:21,704 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:21,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:21,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:35:21,711 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:21,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:21,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-09 18:35:21,718 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:21,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:21,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:35:21,725 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:21,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:21,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:35:21,732 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:21,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:21,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:35:21,739 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:21,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:21,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:35:21,746 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:21,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:21,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-09 18:35:21,759 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:21,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:21,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:35:21,767 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:21,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:21,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:35:21,775 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:21,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:21,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:35:21,782 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:21,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:21,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-09 18:35:21,789 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:21,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:21,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-09 18:35:21,795 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:21,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:21,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:21,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-09 18:35:21,800 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:21,824 INFO L628 ElimStorePlain]: treesize reduction 18, result has 60.0 percent of original size [2021-07-09 18:35:21,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:35:21,825 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-09 18:35:21,859 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:21,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318629905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:21,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:21,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-09 18:35:21,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581574792] [2021-07-09 18:35:21,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:35:21,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:21,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:35:21,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:35:21,859 INFO L87 Difference]: Start difference. First operand 1395 states and 4644 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:22,863 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 65 [2021-07-09 18:35:23,129 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2021-07-09 18:35:23,434 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2021-07-09 18:35:23,853 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2021-07-09 18:35:24,251 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 68 [2021-07-09 18:35:25,056 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 44 [2021-07-09 18:35:25,234 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-07-09 18:35:25,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:25,474 INFO L93 Difference]: Finished difference Result 3009 states and 9476 transitions. [2021-07-09 18:35:25,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:35:25,474 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:35:25,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:25,479 INFO L225 Difference]: With dead ends: 3009 [2021-07-09 18:35:25,479 INFO L226 Difference]: Without dead ends: 2964 [2021-07-09 18:35:25,480 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 3659.3ms TimeCoverageRelationStatistics Valid=601, Invalid=2705, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:35:25,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2964 states. [2021-07-09 18:35:25,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2964 to 1398. [2021-07-09 18:35:25,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 3.3335719398711525) internal successors, (4657), 1397 states have internal predecessors, (4657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:25,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4657 transitions. [2021-07-09 18:35:25,504 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4657 transitions. Word has length 26 [2021-07-09 18:35:25,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:25,504 INFO L482 AbstractCegarLoop]: Abstraction has 1398 states and 4657 transitions. [2021-07-09 18:35:25,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:25,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4657 transitions. [2021-07-09 18:35:25,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:35:25,506 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:25,506 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:25,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable795 [2021-07-09 18:35:25,707 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:25,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:25,707 INFO L82 PathProgramCache]: Analyzing trace with hash -39803338, now seen corresponding path program 41 times [2021-07-09 18:35:25,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:25,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017791641] [2021-07-09 18:35:25,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:25,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:26,136 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:26,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:26,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017791641] [2021-07-09 18:35:26,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017791641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:26,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364412754] [2021-07-09 18:35:26,137 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:26,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:35:26,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:26,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:35:26,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:26,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,616 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-07-09 18:35:26,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 37 [2021-07-09 18:35:26,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:26,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,646 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-07-09 18:35:26,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2021-07-09 18:35:26,651 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:26,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,675 INFO L354 Elim1Store]: treesize reduction 26, result has 21.2 percent of original size [2021-07-09 18:35:26,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 25 [2021-07-09 18:35:26,676 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:26,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,700 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:26,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 45 [2021-07-09 18:35:26,712 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:26,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,736 INFO L354 Elim1Store]: treesize reduction 26, result has 21.2 percent of original size [2021-07-09 18:35:26,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 25 [2021-07-09 18:35:26,737 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:26,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,754 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:35:26,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-09 18:35:26,755 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:26,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,771 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:35:26,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-07-09 18:35:26,772 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:26,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,796 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-07-09 18:35:26,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-07-09 18:35:26,797 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:26,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,815 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:35:26,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-07-09 18:35:26,816 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:26,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,832 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:35:26,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-09 18:35:26,833 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:26,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,859 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-07-09 18:35:26,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-07-09 18:35:26,863 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:26,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,878 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:35:26,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 1 [2021-07-09 18:35:26,879 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:26,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,895 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:35:26,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-09 18:35:26,896 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:26,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,912 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:35:26,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 1 [2021-07-09 18:35:26,913 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:26,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,928 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:35:26,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-09 18:35:26,928 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:26,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,938 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:35:26,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-07-09 18:35:26,938 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:27,039 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-07-09 18:35:27,039 INFO L628 ElimStorePlain]: treesize reduction 66, result has 65.3 percent of original size [2021-07-09 18:35:27,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:35:27,041 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:841, output treesize:133 [2021-07-09 18:35:27,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:27,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364412754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:27,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:27,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-09 18:35:27,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026362131] [2021-07-09 18:35:27,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:35:27,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:27,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:35:27,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:35:27,186 INFO L87 Difference]: Start difference. First operand 1398 states and 4657 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:27,562 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-07-09 18:35:27,726 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-07-09 18:35:27,850 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 69 [2021-07-09 18:35:28,175 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2021-07-09 18:35:28,332 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 70 [2021-07-09 18:35:28,885 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 69 [2021-07-09 18:35:29,367 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 70 [2021-07-09 18:35:29,656 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 55 [2021-07-09 18:35:29,840 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 60 [2021-07-09 18:35:30,149 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2021-07-09 18:35:30,382 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 48 [2021-07-09 18:35:30,518 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 43 [2021-07-09 18:35:30,770 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 50 [2021-07-09 18:35:30,975 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 42 [2021-07-09 18:35:31,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:31,591 INFO L93 Difference]: Finished difference Result 3194 states and 9881 transitions. [2021-07-09 18:35:31,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:35:31,591 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:35:31,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:31,596 INFO L225 Difference]: With dead ends: 3194 [2021-07-09 18:35:31,596 INFO L226 Difference]: Without dead ends: 3134 [2021-07-09 18:35:31,596 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 4323.7ms TimeCoverageRelationStatistics Valid=743, Invalid=3039, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:35:31,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3134 states. [2021-07-09 18:35:31,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3134 to 1411. [2021-07-09 18:35:31,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1411 states, 1410 states have (on average 3.3453900709219857) internal successors, (4717), 1410 states have internal predecessors, (4717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:31,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1411 states to 1411 states and 4717 transitions. [2021-07-09 18:35:31,621 INFO L78 Accepts]: Start accepts. Automaton has 1411 states and 4717 transitions. Word has length 26 [2021-07-09 18:35:31,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:31,621 INFO L482 AbstractCegarLoop]: Abstraction has 1411 states and 4717 transitions. [2021-07-09 18:35:31,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:31,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1411 states and 4717 transitions. [2021-07-09 18:35:31,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:35:31,623 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:31,623 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:31,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable891 [2021-07-09 18:35:31,824 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:31,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:31,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1882815202, now seen corresponding path program 13 times [2021-07-09 18:35:31,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:31,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424842944] [2021-07-09 18:35:31,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:31,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:32,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:32,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:32,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424842944] [2021-07-09 18:35:32,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424842944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:32,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407444166] [2021-07-09 18:35:32,147 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:32,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:32,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:35:32,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:32,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:32,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:32,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:32,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-09 18:35:32,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:32,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:32,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:32,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:32,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:35:32,537 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:32,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:32,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:32,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:32,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:35:32,542 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:32,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:32,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:32,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:32,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:35:32,547 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:32,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:32,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:32,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:32,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:35:32,553 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:32,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:32,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:32,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:32,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:35:32,559 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:32,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:32,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:32,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:32,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:35:32,565 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:32,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:32,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:32,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:32,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:35:32,571 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:32,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:32,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:32,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:32,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:35:32,576 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:32,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:32,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:32,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:32,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:35:32,582 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:32,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:32,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:32,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:32,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:35:32,587 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:32,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:32,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:32,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:32,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:35:32,593 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:32,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:32,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:32,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:32,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:35:32,598 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:32,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:32,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:32,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:32,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:35:32,604 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:32,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:32,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:32,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:35:32,608 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:32,685 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-09 18:35:32,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:35:32,686 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-09 18:35:32,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:32,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407444166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:32,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:32,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:35:32,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267760534] [2021-07-09 18:35:32,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:35:32,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:32,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:35:32,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:35:32,743 INFO L87 Difference]: Start difference. First operand 1411 states and 4717 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:33,886 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2021-07-09 18:35:34,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:34,571 INFO L93 Difference]: Finished difference Result 1958 states and 6368 transitions. [2021-07-09 18:35:34,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:35:34,572 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:35:34,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:34,575 INFO L225 Difference]: With dead ends: 1958 [2021-07-09 18:35:34,575 INFO L226 Difference]: Without dead ends: 1943 [2021-07-09 18:35:34,575 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1745.9ms TimeCoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:35:34,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1943 states. [2021-07-09 18:35:34,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1943 to 1455. [2021-07-09 18:35:34,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1455 states, 1454 states have (on average 3.343878954607978) internal successors, (4862), 1454 states have internal predecessors, (4862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:34,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1455 states to 1455 states and 4862 transitions. [2021-07-09 18:35:34,594 INFO L78 Accepts]: Start accepts. Automaton has 1455 states and 4862 transitions. Word has length 26 [2021-07-09 18:35:34,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:34,594 INFO L482 AbstractCegarLoop]: Abstraction has 1455 states and 4862 transitions. [2021-07-09 18:35:34,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:34,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states and 4862 transitions. [2021-07-09 18:35:34,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:35:34,596 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:34,596 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:34,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable996 [2021-07-09 18:35:34,797 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:34,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:34,797 INFO L82 PathProgramCache]: Analyzing trace with hash 950706158, now seen corresponding path program 14 times [2021-07-09 18:35:34,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:34,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434868361] [2021-07-09 18:35:34,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:35,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:35,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:35,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434868361] [2021-07-09 18:35:35,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434868361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:35,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972734906] [2021-07-09 18:35:35,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:35,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:35:35,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:35,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:35:35,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:35,500 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-07-09 18:35:35,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:35,580 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-09 18:35:35,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-07-09 18:35:35,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:35,717 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2021-07-09 18:35:35,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:35,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:35,740 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-09 18:35:35,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 29 [2021-07-09 18:35:35,741 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:35,874 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-07-09 18:35:35,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:35,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:35,893 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:35,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 34 [2021-07-09 18:35:35,898 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:36,021 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-07-09 18:35:36,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:36,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:36,040 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-09 18:35:36,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 30 [2021-07-09 18:35:36,041 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:36,160 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-07-09 18:35:36,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:36,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:36,181 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-09 18:35:36,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 34 [2021-07-09 18:35:36,185 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:36,300 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-07-09 18:35:36,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:36,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:36,317 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:36,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 41 [2021-07-09 18:35:36,319 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:36,450 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-07-09 18:35:36,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:36,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:36,470 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-09 18:35:36,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2021-07-09 18:35:36,472 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:36,588 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-07-09 18:35:36,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:36,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:36,603 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:36,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 41 [2021-07-09 18:35:36,605 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:36,722 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-07-09 18:35:36,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:36,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:35:36,736 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:445, output treesize:479 [2021-07-09 18:35:36,996 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-07-09 18:35:37,177 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-07-09 18:35:37,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:37,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972734906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:37,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:37,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:35:37,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037599786] [2021-07-09 18:35:37,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:35:37,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:37,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:35:37,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:35:37,270 INFO L87 Difference]: Start difference. First operand 1455 states and 4862 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:38,087 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 36 [2021-07-09 18:35:38,553 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 44 [2021-07-09 18:35:39,040 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-07-09 18:35:39,476 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-07-09 18:35:39,689 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-07-09 18:35:39,947 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2021-07-09 18:35:40,278 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2021-07-09 18:35:40,627 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2021-07-09 18:35:40,873 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 41 [2021-07-09 18:35:41,310 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 70 [2021-07-09 18:35:41,527 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 33 [2021-07-09 18:35:41,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:41,613 INFO L93 Difference]: Finished difference Result 2081 states and 6658 transitions. [2021-07-09 18:35:41,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:35:41,613 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:35:41,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:41,617 INFO L225 Difference]: With dead ends: 2081 [2021-07-09 18:35:41,617 INFO L226 Difference]: Without dead ends: 2051 [2021-07-09 18:35:41,617 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 4614.6ms TimeCoverageRelationStatistics Valid=271, Invalid=1621, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:35:41,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2021-07-09 18:35:41,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 1451. [2021-07-09 18:35:41,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1451 states, 1450 states have (on average 3.3393103448275863) internal successors, (4842), 1450 states have internal predecessors, (4842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:41,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1451 states to 1451 states and 4842 transitions. [2021-07-09 18:35:41,640 INFO L78 Accepts]: Start accepts. Automaton has 1451 states and 4842 transitions. Word has length 26 [2021-07-09 18:35:41,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:41,640 INFO L482 AbstractCegarLoop]: Abstraction has 1451 states and 4842 transitions. [2021-07-09 18:35:41,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:41,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1451 states and 4842 transitions. [2021-07-09 18:35:41,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:35:41,642 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:41,642 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:41,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1028,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:41,844 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:41,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:41,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1764992822, now seen corresponding path program 15 times [2021-07-09 18:35:41,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:41,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153340236] [2021-07-09 18:35:41,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:42,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:42,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:42,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153340236] [2021-07-09 18:35:42,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153340236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:42,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516421956] [2021-07-09 18:35:42,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:42,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:35:42,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:42,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:35:42,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:42,489 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:35:42,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-07-09 18:35:42,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:42,504 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:42,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:35:42,506 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:42,514 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:35:42,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:35:42,514 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:42,540 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:35:42,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-07-09 18:35:42,559 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:42,568 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:35:42,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:35:42,569 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:42,584 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:42,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:35:42,586 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:42,595 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:35:42,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:35:42,596 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:42,604 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:35:42,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:35:42,605 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:42,620 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:35:42,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:35:42,622 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:42,636 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:42,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-09 18:35:42,641 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:42,649 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:35:42,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:35:42,650 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:42,667 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:35:42,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:35:42,670 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:42,686 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:35:42,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:35:42,687 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:42,695 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:35:42,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:35:42,696 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:42,723 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:35:42,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:35:42,725 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:42,730 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:35:42,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:35:42,731 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:42,834 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-07-09 18:35:42,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:42,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:35:42,847 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:769, output treesize:376 [2021-07-09 18:35:43,128 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-07-09 18:35:43,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:43,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516421956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:43,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:43,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-09 18:35:43,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587253588] [2021-07-09 18:35:43,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:35:43,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:43,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:35:43,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:35:43,241 INFO L87 Difference]: Start difference. First operand 1451 states and 4842 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:43,814 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 45 [2021-07-09 18:35:44,277 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 56 [2021-07-09 18:35:44,547 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-07-09 18:35:44,848 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2021-07-09 18:35:45,776 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2021-07-09 18:35:45,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:45,846 INFO L93 Difference]: Finished difference Result 2000 states and 6458 transitions. [2021-07-09 18:35:45,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:35:45,846 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:35:45,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:45,850 INFO L225 Difference]: With dead ends: 2000 [2021-07-09 18:35:45,850 INFO L226 Difference]: Without dead ends: 1985 [2021-07-09 18:35:45,850 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 2683.9ms TimeCoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:35:45,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2021-07-09 18:35:45,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1452. [2021-07-09 18:35:45,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1452 states, 1451 states have (on average 3.3418332184700206) internal successors, (4849), 1451 states have internal predecessors, (4849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:45,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 4849 transitions. [2021-07-09 18:35:45,870 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 4849 transitions. Word has length 26 [2021-07-09 18:35:45,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:45,870 INFO L482 AbstractCegarLoop]: Abstraction has 1452 states and 4849 transitions. [2021-07-09 18:35:45,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:45,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 4849 transitions. [2021-07-09 18:35:45,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:35:45,873 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:45,873 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:46,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1054,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:46,088 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:46,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:46,088 INFO L82 PathProgramCache]: Analyzing trace with hash 505986546, now seen corresponding path program 16 times [2021-07-09 18:35:46,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:46,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22731607] [2021-07-09 18:35:46,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:46,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:46,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:46,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:46,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22731607] [2021-07-09 18:35:46,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22731607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:46,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191792486] [2021-07-09 18:35:46,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:35:46,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:35:46,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:46,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:35:46,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:46,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:46,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:46,730 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:46,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-07-09 18:35:46,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:46,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:46,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:46,741 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:46,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:35:46,742 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:46,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:46,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:46,752 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:46,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:35:46,753 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:46,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:46,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:46,765 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:46,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 24 [2021-07-09 18:35:46,769 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:46,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:46,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:46,783 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:35:46,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-07-09 18:35:46,785 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:46,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:46,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:46,797 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:46,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:35:46,797 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:46,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:46,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:46,810 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:46,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-07-09 18:35:46,814 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:46,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:46,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:46,824 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:46,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:35:46,825 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:46,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:46,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:46,839 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:46,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-07-09 18:35:46,840 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:46,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:46,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:46,851 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:46,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:35:46,851 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:46,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:46,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:46,864 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:35:46,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 20 [2021-07-09 18:35:46,866 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:46,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:46,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:46,880 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:46,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:35:46,881 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:46,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:46,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:46,893 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:35:46,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-07-09 18:35:46,895 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:46,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:46,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:46,905 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:46,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-07-09 18:35:46,906 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:46,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:46,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:46,917 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:46,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-07-09 18:35:46,919 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:46,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:46,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,926 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:46,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:35:46,927 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:46,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:46,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:35:46,997 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:729, output treesize:181 [2021-07-09 18:35:47,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:47,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191792486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:47,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:47,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:35:47,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205621210] [2021-07-09 18:35:47,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:35:47,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:47,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:35:47,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:35:47,190 INFO L87 Difference]: Start difference. First operand 1452 states and 4849 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:47,917 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 43 [2021-07-09 18:35:48,267 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-07-09 18:35:48,449 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 46 [2021-07-09 18:35:48,614 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-07-09 18:35:48,801 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2021-07-09 18:35:49,017 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 59 [2021-07-09 18:35:49,257 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 58 [2021-07-09 18:35:49,474 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-09 18:35:49,810 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2021-07-09 18:35:49,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:49,993 INFO L93 Difference]: Finished difference Result 2355 states and 7541 transitions. [2021-07-09 18:35:49,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:35:49,994 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:35:49,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:49,998 INFO L225 Difference]: With dead ends: 2355 [2021-07-09 18:35:49,998 INFO L226 Difference]: Without dead ends: 2325 [2021-07-09 18:35:49,998 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 2944.5ms TimeCoverageRelationStatistics Valid=270, Invalid=1290, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:35:50,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2325 states. [2021-07-09 18:35:50,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2325 to 1465. [2021-07-09 18:35:50,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1464 states have (on average 3.3490437158469946) internal successors, (4903), 1464 states have internal predecessors, (4903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:50,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 4903 transitions. [2021-07-09 18:35:50,022 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 4903 transitions. Word has length 26 [2021-07-09 18:35:50,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:50,022 INFO L482 AbstractCegarLoop]: Abstraction has 1465 states and 4903 transitions. [2021-07-09 18:35:50,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:50,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 4903 transitions. [2021-07-09 18:35:50,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:35:50,024 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:50,024 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:50,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1107,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:50,224 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:50,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:50,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1484642536, now seen corresponding path program 17 times [2021-07-09 18:35:50,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:50,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691766280] [2021-07-09 18:35:50,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:50,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:50,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:50,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:50,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691766280] [2021-07-09 18:35:50,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691766280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:50,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053764739] [2021-07-09 18:35:50,536 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:50,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:35:50,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:50,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:35:50,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:50,888 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-07-09 18:35:51,126 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_46], 2=[A, v_prenex_45]} [2021-07-09 18:35:51,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:51,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:35:51,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:51,231 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-07-09 18:35:51,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:51,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:51,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:35:51,236 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:51,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:51,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:51,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:51,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:51,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:35:51,283 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:51,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:51,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:51,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:35:51,287 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:51,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:51,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:35:51,323 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-07-09 18:35:51,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:51,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053764739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:51,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:51,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:35:51,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269353983] [2021-07-09 18:35:51,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:35:51,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:51,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:35:51,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:35:51,376 INFO L87 Difference]: Start difference. First operand 1465 states and 4903 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:52,372 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2021-07-09 18:35:52,697 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-07-09 18:35:53,039 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2021-07-09 18:35:53,227 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2021-07-09 18:35:53,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:53,398 INFO L93 Difference]: Finished difference Result 2028 states and 6589 transitions. [2021-07-09 18:35:53,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:35:53,398 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:35:53,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:53,401 INFO L225 Difference]: With dead ends: 2028 [2021-07-09 18:35:53,401 INFO L226 Difference]: Without dead ends: 1998 [2021-07-09 18:35:53,402 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 2303.0ms TimeCoverageRelationStatistics Valid=235, Invalid=1171, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:35:53,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2021-07-09 18:35:53,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1468. [2021-07-09 18:35:53,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 3.3503749147920927) internal successors, (4915), 1467 states have internal predecessors, (4915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:53,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 4915 transitions. [2021-07-09 18:35:53,422 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 4915 transitions. Word has length 26 [2021-07-09 18:35:53,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:53,422 INFO L482 AbstractCegarLoop]: Abstraction has 1468 states and 4915 transitions. [2021-07-09 18:35:53,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:53,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 4915 transitions. [2021-07-09 18:35:53,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:35:53,424 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:53,424 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:53,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1132 [2021-07-09 18:35:53,625 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:53,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:53,625 INFO L82 PathProgramCache]: Analyzing trace with hash -808425550, now seen corresponding path program 18 times [2021-07-09 18:35:53,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:53,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351125196] [2021-07-09 18:35:53,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:53,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:53,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:53,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:53,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351125196] [2021-07-09 18:35:53,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351125196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:53,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698179957] [2021-07-09 18:35:53,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:53,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:35:53,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:53,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:35:53,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:54,286 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-07-09 18:35:54,423 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_54, v_prenex_64, v_prenex_58], 6=[A, v_prenex_60, v_prenex_62, v_prenex_56, v_prenex_66]} [2021-07-09 18:35:54,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:54,437 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:54,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:35:54,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:54,770 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 130 [2021-07-09 18:35:54,770 INFO L628 ElimStorePlain]: treesize reduction 272, result has 55.1 percent of original size [2021-07-09 18:35:54,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:54,782 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:54,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:35:54,784 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:54,901 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-07-09 18:35:54,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:54,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:54,913 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:54,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:35:54,915 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:55,025 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-07-09 18:35:55,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:55,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:55,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:55,052 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-09 18:35:55,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 18:35:55,053 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:55,159 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-07-09 18:35:55,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:55,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:55,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:55,171 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:55,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-07-09 18:35:55,174 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:55,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:55,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:55,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:55,286 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-09 18:35:55,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2021-07-09 18:35:55,287 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:55,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:55,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:55,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:55,394 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:55,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-07-09 18:35:55,398 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:55,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:55,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:55,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:55,498 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-09 18:35:55,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-07-09 18:35:55,500 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:55,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:55,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:35:55,598 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:621, output treesize:217 [2021-07-09 18:35:55,764 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-07-09 18:35:55,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:55,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698179957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:55,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:55,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:35:55,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628550735] [2021-07-09 18:35:55,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:35:55,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:55,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:35:55,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:35:55,854 INFO L87 Difference]: Start difference. First operand 1468 states and 4915 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:56,439 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-07-09 18:35:56,975 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-07-09 18:35:57,430 WARN L205 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-07-09 18:35:57,772 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-07-09 18:35:57,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:57,985 INFO L93 Difference]: Finished difference Result 1972 states and 6440 transitions. [2021-07-09 18:35:57,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:35:57,985 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:35:57,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:57,988 INFO L225 Difference]: With dead ends: 1972 [2021-07-09 18:35:57,988 INFO L226 Difference]: Without dead ends: 1957 [2021-07-09 18:35:57,989 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 2526.6ms TimeCoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:35:57,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2021-07-09 18:35:58,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1465. [2021-07-09 18:35:58,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1464 states have (on average 3.3490437158469946) internal successors, (4903), 1464 states have internal predecessors, (4903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:58,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 4903 transitions. [2021-07-09 18:35:58,026 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 4903 transitions. Word has length 26 [2021-07-09 18:35:58,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:58,026 INFO L482 AbstractCegarLoop]: Abstraction has 1465 states and 4903 transitions. [2021-07-09 18:35:58,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:58,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 4903 transitions. [2021-07-09 18:35:58,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:35:58,029 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:58,029 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:58,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1142,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:58,245 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:58,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:58,245 INFO L82 PathProgramCache]: Analyzing trace with hash -2091148486, now seen corresponding path program 19 times [2021-07-09 18:35:58,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:58,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962899898] [2021-07-09 18:35:58,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:58,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:58,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:58,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:58,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962899898] [2021-07-09 18:35:58,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962899898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:58,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198724290] [2021-07-09 18:35:58,645 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:58,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:58,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:35:58,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:59,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:59,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:59,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:59,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:35:59,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:59,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:59,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:59,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:59,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:35:59,030 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:59,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:59,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:59,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:59,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:35:59,037 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:59,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:59,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:59,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:59,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:35:59,043 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:59,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:59,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:59,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:59,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:35:59,049 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:59,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:59,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:59,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:59,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:35:59,056 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:59,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:59,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:59,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:59,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:35:59,062 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:59,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:59,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:59,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:59,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:35:59,068 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:59,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:59,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:59,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:59,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:35:59,074 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:59,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:59,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:59,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:59,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:35:59,080 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:59,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:59,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:59,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:59,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:35:59,087 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:59,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:59,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:59,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:59,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-09 18:35:59,093 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:59,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:59,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:59,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:59,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:35:59,099 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:59,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:59,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:59,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:59,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:35:59,104 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:59,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:59,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:59,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:35:59,109 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:59,181 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-09 18:35:59,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:35:59,182 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-09 18:35:59,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:59,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198724290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:59,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:59,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:35:59,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214101573] [2021-07-09 18:35:59,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:35:59,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:59,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:35:59,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:35:59,231 INFO L87 Difference]: Start difference. First operand 1465 states and 4903 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:00,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:00,118 INFO L93 Difference]: Finished difference Result 1916 states and 6261 transitions. [2021-07-09 18:36:00,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:36:00,118 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:36:00,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:00,122 INFO L225 Difference]: With dead ends: 1916 [2021-07-09 18:36:00,122 INFO L226 Difference]: Without dead ends: 1895 [2021-07-09 18:36:00,122 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1074.2ms TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:36:00,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1895 states. [2021-07-09 18:36:00,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1895 to 1506. [2021-07-09 18:36:00,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 3.345514950166113) internal successors, (5035), 1505 states have internal predecessors, (5035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:00,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 5035 transitions. [2021-07-09 18:36:00,141 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 5035 transitions. Word has length 26 [2021-07-09 18:36:00,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:00,141 INFO L482 AbstractCegarLoop]: Abstraction has 1506 states and 5035 transitions. [2021-07-09 18:36:00,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:00,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 5035 transitions. [2021-07-09 18:36:00,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:36:00,144 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:00,144 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:36:00,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1167 [2021-07-09 18:36:00,346 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:00,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:00,364 INFO L82 PathProgramCache]: Analyzing trace with hash 2036009718, now seen corresponding path program 20 times [2021-07-09 18:36:00,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:00,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383931465] [2021-07-09 18:36:00,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:00,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:00,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:00,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:00,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383931465] [2021-07-09 18:36:00,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383931465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:00,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781175638] [2021-07-09 18:36:00,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:00,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:36:00,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:36:00,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:36:00,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:01,387 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-07-09 18:36:01,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 36 [2021-07-09 18:36:01,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:01,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:01,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-07-09 18:36:01,420 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:01,864 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2021-07-09 18:36:01,864 INFO L628 ElimStorePlain]: treesize reduction 17, result has 95.3 percent of original size [2021-07-09 18:36:01,884 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:01,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 34 [2021-07-09 18:36:01,891 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:01,914 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-07-09 18:36:01,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 29 [2021-07-09 18:36:01,917 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:02,049 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-07-09 18:36:02,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:02,074 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-07-09 18:36:02,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-07-09 18:36:02,076 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:02,098 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-07-09 18:36:02,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 29 [2021-07-09 18:36:02,102 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:02,234 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-07-09 18:36:02,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:02,257 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-07-09 18:36:02,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 28 [2021-07-09 18:36:02,258 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:02,282 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-07-09 18:36:02,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 39 [2021-07-09 18:36:02,284 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:02,414 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-07-09 18:36:02,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:02,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:36:02,464 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:365, output treesize:746 [2021-07-09 18:36:02,885 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2021-07-09 18:36:03,160 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-07-09 18:36:03,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:03,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781175638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:03,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:03,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-09 18:36:03,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95246672] [2021-07-09 18:36:03,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:36:03,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:03,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:36:03,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:36:03,284 INFO L87 Difference]: Start difference. First operand 1506 states and 5035 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:03,444 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 21 [2021-07-09 18:36:03,590 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 27 [2021-07-09 18:36:03,934 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 47 [2021-07-09 18:36:04,235 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 51 [2021-07-09 18:36:04,585 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 50 [2021-07-09 18:36:04,893 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 41 [2021-07-09 18:36:05,113 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-07-09 18:36:05,665 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 83 [2021-07-09 18:36:05,793 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2021-07-09 18:36:06,187 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 53 [2021-07-09 18:36:06,459 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-07-09 18:36:06,917 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 61 [2021-07-09 18:36:07,364 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-07-09 18:36:07,840 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 103 [2021-07-09 18:36:08,207 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 44 [2021-07-09 18:36:08,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:08,256 INFO L93 Difference]: Finished difference Result 2133 states and 6814 transitions. [2021-07-09 18:36:08,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:36:08,256 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:36:08,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:08,260 INFO L225 Difference]: With dead ends: 2133 [2021-07-09 18:36:08,260 INFO L226 Difference]: Without dead ends: 2108 [2021-07-09 18:36:08,260 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 5807.9ms TimeCoverageRelationStatistics Valid=320, Invalid=1486, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:36:08,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-07-09 18:36:08,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1529. [2021-07-09 18:36:08,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.352094240837696) internal successors, (5122), 1528 states have internal predecessors, (5122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:08,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5122 transitions. [2021-07-09 18:36:08,282 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5122 transitions. Word has length 26 [2021-07-09 18:36:08,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:08,282 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 5122 transitions. [2021-07-09 18:36:08,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:08,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5122 transitions. [2021-07-09 18:36:08,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:36:08,284 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:08,284 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:36:08,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1199 [2021-07-09 18:36:08,486 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:08,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:08,486 INFO L82 PathProgramCache]: Analyzing trace with hash 2016041692, now seen corresponding path program 21 times [2021-07-09 18:36:08,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:08,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458303527] [2021-07-09 18:36:08,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:08,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:08,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:08,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:08,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458303527] [2021-07-09 18:36:08,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458303527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:08,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763193651] [2021-07-09 18:36:08,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:08,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:36:08,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:36:08,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:36:08,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:09,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:09,254 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:36:09,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-09 18:36:09,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:09,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:09,263 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:36:09,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:36:09,264 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:09,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:09,274 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:09,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:36:09,278 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:09,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:09,310 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:09,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:36:09,313 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:09,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:09,322 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:36:09,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:36:09,323 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:09,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:09,331 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:36:09,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:36:09,332 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:09,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:09,342 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:36:09,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:36:09,344 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:09,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:09,352 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:36:09,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:36:09,353 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:09,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:09,361 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:36:09,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:36:09,362 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:09,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:09,372 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:09,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:36:09,374 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:09,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:09,384 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:09,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:36:09,387 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:09,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:09,395 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:36:09,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:36:09,396 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:09,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:09,407 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:36:09,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:36:09,408 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:09,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:09,419 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:36:09,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:36:09,421 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:09,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:09,430 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:36:09,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:36:09,431 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:09,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:09,440 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:09,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:36:09,442 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:09,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:09,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:36:09,524 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:657, output treesize:174 [2021-07-09 18:36:09,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:09,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763193651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:09,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:09,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-09 18:36:09,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607241904] [2021-07-09 18:36:09,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:36:09,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:09,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:36:09,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:36:09,708 INFO L87 Difference]: Start difference. First operand 1529 states and 5122 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:11,057 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-07-09 18:36:11,448 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-07-09 18:36:11,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:11,501 INFO L93 Difference]: Finished difference Result 2011 states and 6582 transitions. [2021-07-09 18:36:11,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:36:11,501 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:36:11,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:11,505 INFO L225 Difference]: With dead ends: 2011 [2021-07-09 18:36:11,505 INFO L226 Difference]: Without dead ends: 1982 [2021-07-09 18:36:11,505 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 2093.7ms TimeCoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:36:11,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1982 states. [2021-07-09 18:36:11,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1982 to 1532. [2021-07-09 18:36:11,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1531 states have (on average 3.3527106466361856) internal successors, (5133), 1531 states have internal predecessors, (5133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:11,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 5133 transitions. [2021-07-09 18:36:11,525 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 5133 transitions. Word has length 26 [2021-07-09 18:36:11,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:11,525 INFO L482 AbstractCegarLoop]: Abstraction has 1532 states and 5133 transitions. [2021-07-09 18:36:11,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:11,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 5133 transitions. [2021-07-09 18:36:11,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:36:11,527 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:11,527 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:36:11,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1279 [2021-07-09 18:36:11,729 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:11,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:11,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1960184130, now seen corresponding path program 22 times [2021-07-09 18:36:11,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:11,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96658865] [2021-07-09 18:36:11,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:11,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:12,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:12,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:12,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96658865] [2021-07-09 18:36:12,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96658865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:12,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589182022] [2021-07-09 18:36:12,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:12,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:36:12,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:36:12,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:36:12,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:12,442 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-07-09 18:36:12,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:12,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:12,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:12,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:36:12,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:12,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:12,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:12,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:36:12,504 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:12,605 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-07-09 18:36:12,606 INFO L628 ElimStorePlain]: treesize reduction 91, result has 58.6 percent of original size [2021-07-09 18:36:12,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:12,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:36:12,610 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:12,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:12,650 INFO L518 ElimStorePlain]: Eliminatee v_prenex_87 vanished before elimination [2021-07-09 18:36:12,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:12,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:12,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:12,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:36:12,656 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:12,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:12,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:12,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:36:12,660 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:12,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:12,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:36:12,695 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:272, output treesize:51 [2021-07-09 18:36:12,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:12,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589182022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:12,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:12,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:36:12,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114166300] [2021-07-09 18:36:12,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:36:12,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:12,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:36:12,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:36:12,750 INFO L87 Difference]: Start difference. First operand 1532 states and 5133 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:13,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:13,002 INFO L93 Difference]: Finished difference Result 1607 states and 5324 transitions. [2021-07-09 18:36:13,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:36:13,002 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:36:13,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:13,005 INFO L225 Difference]: With dead ends: 1607 [2021-07-09 18:36:13,005 INFO L226 Difference]: Without dead ends: 1592 [2021-07-09 18:36:13,005 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 700.6ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:36:13,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2021-07-09 18:36:13,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1538. [2021-07-09 18:36:13,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 3.3545868575146387) internal successors, (5156), 1537 states have internal predecessors, (5156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:13,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 5156 transitions. [2021-07-09 18:36:13,024 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 5156 transitions. Word has length 26 [2021-07-09 18:36:13,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:13,024 INFO L482 AbstractCegarLoop]: Abstraction has 1538 states and 5156 transitions. [2021-07-09 18:36:13,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:13,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 5156 transitions. [2021-07-09 18:36:13,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:36:13,026 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:13,026 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:36:13,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1320,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:13,227 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:13,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:13,227 INFO L82 PathProgramCache]: Analyzing trace with hash -389358530, now seen corresponding path program 23 times [2021-07-09 18:36:13,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:13,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557252524] [2021-07-09 18:36:13,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:13,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:13,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:13,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:13,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557252524] [2021-07-09 18:36:13,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557252524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:13,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541907555] [2021-07-09 18:36:13,527 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:13,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:36:13,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:36:13,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:36:13,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:13,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:13,956 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:13,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-09 18:36:13,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:13,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:13,979 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:36:13,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:36:13,981 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:14,143 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-07-09 18:36:14,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:14,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:14,166 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:36:14,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:36:14,168 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:14,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:14,187 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:36:14,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:36:14,190 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:14,325 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-07-09 18:36:14,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:14,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:14,342 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:14,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:36:14,346 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:14,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:14,364 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:36:14,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-07-09 18:36:14,366 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:14,618 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-07-09 18:36:14,618 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.9 percent of original size [2021-07-09 18:36:14,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:14,633 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:14,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-07-09 18:36:14,639 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:14,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:14,653 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:36:14,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:36:14,655 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:14,879 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-07-09 18:36:14,880 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.5 percent of original size [2021-07-09 18:36:14,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:36:14,903 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:259 [2021-07-09 18:36:15,081 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-07-09 18:36:15,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:15,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541907555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:15,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:15,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:36:15,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297640627] [2021-07-09 18:36:15,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:36:15,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:15,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:36:15,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:36:15,175 INFO L87 Difference]: Start difference. First operand 1538 states and 5156 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:15,952 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-07-09 18:36:16,565 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-07-09 18:36:16,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:16,609 INFO L93 Difference]: Finished difference Result 2227 states and 7222 transitions. [2021-07-09 18:36:16,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:36:16,610 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:36:16,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:16,613 INFO L225 Difference]: With dead ends: 2227 [2021-07-09 18:36:16,614 INFO L226 Difference]: Without dead ends: 2177 [2021-07-09 18:36:16,614 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1793.6ms TimeCoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:36:16,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2177 states. [2021-07-09 18:36:16,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2177 to 1545. [2021-07-09 18:36:16,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1544 states have (on average 3.3588082901554404) internal successors, (5186), 1544 states have internal predecessors, (5186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:16,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 5186 transitions. [2021-07-09 18:36:16,635 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 5186 transitions. Word has length 26 [2021-07-09 18:36:16,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:16,636 INFO L482 AbstractCegarLoop]: Abstraction has 1545 states and 5186 transitions. [2021-07-09 18:36:16,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:16,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 5186 transitions. [2021-07-09 18:36:16,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:36:16,638 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:16,638 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:36:16,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1331 [2021-07-09 18:36:16,838 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:16,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:16,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1800748254, now seen corresponding path program 24 times [2021-07-09 18:36:16,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:16,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464784780] [2021-07-09 18:36:16,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:16,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:17,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:17,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:17,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464784780] [2021-07-09 18:36:17,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464784780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:17,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371575509] [2021-07-09 18:36:17,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:17,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:36:17,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:36:17,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:36:17,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:17,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,505 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:36:17,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:36:17,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:17,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,513 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:36:17,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:36:17,514 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:17,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,521 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:36:17,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:36:17,522 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:17,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:17,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:36:17,537 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:17,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,547 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:17,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:36:17,550 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:17,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,561 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:17,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:36:17,562 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:17,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,569 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:36:17,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:36:17,570 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:17,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,580 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:17,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:36:17,581 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:17,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,590 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:36:17,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-09 18:36:17,590 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:17,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,600 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:17,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:36:17,604 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:17,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,612 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:36:17,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:36:17,613 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:17,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,620 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:36:17,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:36:17,621 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:17,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,631 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:36:17,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:36:17,633 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:17,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,642 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:36:17,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:36:17,644 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:17,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,654 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:36:17,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:36:17,655 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:17,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,660 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:36:17,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:36:17,661 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:17,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:17,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:36:17,728 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-07-09 18:36:17,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:17,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371575509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:17,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:17,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:36:17,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028947127] [2021-07-09 18:36:17,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:36:17,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:17,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:36:17,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:36:17,910 INFO L87 Difference]: Start difference. First operand 1545 states and 5186 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:18,559 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2021-07-09 18:36:19,139 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2021-07-09 18:36:19,388 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-07-09 18:36:19,611 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-07-09 18:36:19,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:19,683 INFO L93 Difference]: Finished difference Result 2071 states and 6812 transitions. [2021-07-09 18:36:19,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:36:19,683 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:36:19,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:19,686 INFO L225 Difference]: With dead ends: 2071 [2021-07-09 18:36:19,686 INFO L226 Difference]: Without dead ends: 2052 [2021-07-09 18:36:19,686 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 2045.9ms TimeCoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:36:19,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2021-07-09 18:36:19,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 1557. [2021-07-09 18:36:19,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1557 states, 1556 states have (on average 3.3618251928020566) internal successors, (5231), 1556 states have internal predecessors, (5231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:19,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 5231 transitions. [2021-07-09 18:36:19,708 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 5231 transitions. Word has length 26 [2021-07-09 18:36:19,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:19,708 INFO L482 AbstractCegarLoop]: Abstraction has 1557 states and 5231 transitions. [2021-07-09 18:36:19,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:19,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 5231 transitions. [2021-07-09 18:36:19,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:36:19,710 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:19,710 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:36:19,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1387 [2021-07-09 18:36:19,911 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:19,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:19,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1506727430, now seen corresponding path program 25 times [2021-07-09 18:36:19,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:19,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705134788] [2021-07-09 18:36:19,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:19,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:20,253 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-07-09 18:36:20,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:20,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:20,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705134788] [2021-07-09 18:36:20,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705134788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:20,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721002684] [2021-07-09 18:36:20,366 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:20,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:20,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:36:20,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:20,756 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-07-09 18:36:20,866 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_98], 3=[A, v_prenex_100], 6=[v_prenex_99]} [2021-07-09 18:36:20,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:20,879 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:20,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:36:20,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:20,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:20,890 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:20,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:36:20,893 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:21,029 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-07-09 18:36:21,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:21,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:21,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:21,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:21,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-07-09 18:36:21,044 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:21,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:21,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:21,055 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-09 18:36:21,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-07-09 18:36:21,056 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:21,185 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-07-09 18:36:21,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:21,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:21,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:21,198 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-09 18:36:21,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 18:36:21,200 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:21,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:21,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:21,210 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:21,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-07-09 18:36:21,214 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:21,328 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-07-09 18:36:21,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:21,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:21,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:21,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:21,342 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-09 18:36:21,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2021-07-09 18:36:21,344 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:21,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:21,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:21,354 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:21,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-07-09 18:36:21,359 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:21,468 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-07-09 18:36:21,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:21,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:36:21,476 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:375, output treesize:228 [2021-07-09 18:36:21,648 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-07-09 18:36:21,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:21,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721002684] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:21,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:21,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:36:21,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232099869] [2021-07-09 18:36:21,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:36:21,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:21,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:36:21,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:36:21,754 INFO L87 Difference]: Start difference. First operand 1557 states and 5231 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:22,257 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 33 [2021-07-09 18:36:22,522 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-07-09 18:36:22,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:22,984 INFO L93 Difference]: Finished difference Result 2052 states and 6751 transitions. [2021-07-09 18:36:22,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:36:22,984 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:36:22,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:22,987 INFO L225 Difference]: With dead ends: 2052 [2021-07-09 18:36:22,987 INFO L226 Difference]: Without dead ends: 2027 [2021-07-09 18:36:22,988 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1803.8ms TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:36:22,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2021-07-09 18:36:23,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1563. [2021-07-09 18:36:23,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1563 states, 1562 states have (on average 3.360435339308579) internal successors, (5249), 1562 states have internal predecessors, (5249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:23,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 5249 transitions. [2021-07-09 18:36:23,008 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 5249 transitions. Word has length 26 [2021-07-09 18:36:23,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:23,008 INFO L482 AbstractCegarLoop]: Abstraction has 1563 states and 5249 transitions. [2021-07-09 18:36:23,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:23,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 5249 transitions. [2021-07-09 18:36:23,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:36:23,010 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:23,010 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:36:23,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1404 [2021-07-09 18:36:23,211 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:23,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:23,211 INFO L82 PathProgramCache]: Analyzing trace with hash -132958662, now seen corresponding path program 42 times [2021-07-09 18:36:23,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:23,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820376648] [2021-07-09 18:36:23,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:23,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:23,667 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:23,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:23,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820376648] [2021-07-09 18:36:23,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820376648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:23,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352086289] [2021-07-09 18:36:23,667 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:23,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:36:23,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:36:23,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 18:36:23,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:23,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:23,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:23,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:23,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:23,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:23,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:23,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-07-09 18:36:23,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:23,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:23,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:23,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:23,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:23,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:23,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:23,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-07-09 18:36:23,985 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:23,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:23,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:23,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:23,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:23,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:23,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:36:23,992 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:23,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:23,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:23,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:23,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:23,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:23,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-07-09 18:36:24,001 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:24,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:24,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:36:24,008 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:24,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:24,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:24,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-07-09 18:36:24,016 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:24,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:24,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:24,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-07-09 18:36:24,024 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:24,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:24,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:24,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-07-09 18:36:24,032 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:24,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:24,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:24,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:36:24,040 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:24,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:24,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-07-09 18:36:24,047 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:24,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:24,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:24,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-07-09 18:36:24,055 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:24,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:24,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:24,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-07-09 18:36:24,062 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:24,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:24,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:24,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-07-09 18:36:24,070 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:24,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:24,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:24,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-07-09 18:36:24,078 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:24,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:24,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-07-09 18:36:24,085 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:24,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:24,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:24,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:24,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:36:24,089 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:24,123 INFO L628 ElimStorePlain]: treesize reduction 21, result has 65.0 percent of original size [2021-07-09 18:36:24,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:36:24,124 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:809, output treesize:39 [2021-07-09 18:36:24,183 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:24,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352086289] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:24,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:24,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:36:24,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257222056] [2021-07-09 18:36:24,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:36:24,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:24,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:36:24,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:36:24,183 INFO L87 Difference]: Start difference. First operand 1563 states and 5249 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:25,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:25,183 INFO L93 Difference]: Finished difference Result 2040 states and 6673 transitions. [2021-07-09 18:36:25,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:36:25,183 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:36:25,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:25,187 INFO L225 Difference]: With dead ends: 2040 [2021-07-09 18:36:25,187 INFO L226 Difference]: Without dead ends: 2014 [2021-07-09 18:36:25,187 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1325.5ms TimeCoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:36:25,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2021-07-09 18:36:25,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 1579. [2021-07-09 18:36:25,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1579 states, 1578 states have (on average 3.3542458808618503) internal successors, (5293), 1578 states have internal predecessors, (5293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:25,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 5293 transitions. [2021-07-09 18:36:25,209 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 5293 transitions. Word has length 26 [2021-07-09 18:36:25,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:25,209 INFO L482 AbstractCegarLoop]: Abstraction has 1579 states and 5293 transitions. [2021-07-09 18:36:25,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:25,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 5293 transitions. [2021-07-09 18:36:25,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:36:25,212 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:25,212 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:36:25,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1437,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:25,412 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:25,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:25,413 INFO L82 PathProgramCache]: Analyzing trace with hash 934915902, now seen corresponding path program 43 times [2021-07-09 18:36:25,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:25,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515458434] [2021-07-09 18:36:25,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:25,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:25,816 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:25,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:25,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515458434] [2021-07-09 18:36:25,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515458434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:25,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733494445] [2021-07-09 18:36:25,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:25,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:36:25,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:26,132 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_103], 5=[v_prenex_101, v_prenex_105]} [2021-07-09 18:36:26,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:26,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:26,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:26,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:26,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-09 18:36:26,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:26,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:26,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:26,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:26,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:36:26,146 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:26,223 INFO L628 ElimStorePlain]: treesize reduction 141, result has 40.8 percent of original size [2021-07-09 18:36:26,223 INFO L518 ElimStorePlain]: Eliminatee v_prenex_103 vanished before elimination [2021-07-09 18:36:26,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:26,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:26,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:26,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:36:26,228 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:26,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:26,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:26,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:36:26,258 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:26,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:26,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:36:26,283 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:294, output treesize:33 [2021-07-09 18:36:26,325 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:26,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733494445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:26,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:26,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-09 18:36:26,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660283142] [2021-07-09 18:36:26,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:36:26,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:26,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:36:26,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:36:26,326 INFO L87 Difference]: Start difference. First operand 1579 states and 5293 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:28,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:28,813 INFO L93 Difference]: Finished difference Result 2239 states and 7310 transitions. [2021-07-09 18:36:28,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:36:28,813 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:36:28,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:28,816 INFO L225 Difference]: With dead ends: 2239 [2021-07-09 18:36:28,816 INFO L226 Difference]: Without dead ends: 2224 [2021-07-09 18:36:28,817 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 2601.4ms TimeCoverageRelationStatistics Valid=512, Invalid=2244, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:36:28,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2224 states. [2021-07-09 18:36:28,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2224 to 1579. [2021-07-09 18:36:28,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1579 states, 1578 states have (on average 3.3542458808618503) internal successors, (5293), 1578 states have internal predecessors, (5293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:28,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 5293 transitions. [2021-07-09 18:36:28,839 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 5293 transitions. Word has length 26 [2021-07-09 18:36:28,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:28,839 INFO L482 AbstractCegarLoop]: Abstraction has 1579 states and 5293 transitions. [2021-07-09 18:36:28,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:28,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 5293 transitions. [2021-07-09 18:36:28,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:36:28,841 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:28,841 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:36:29,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1456 [2021-07-09 18:36:29,053 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:29,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:29,053 INFO L82 PathProgramCache]: Analyzing trace with hash 346540478, now seen corresponding path program 26 times [2021-07-09 18:36:29,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:29,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953953150] [2021-07-09 18:36:29,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:29,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:29,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:29,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953953150] [2021-07-09 18:36:29,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953953150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:29,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921855826] [2021-07-09 18:36:29,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:29,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:36:29,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:36:29,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:36:29,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:29,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:29,689 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:36:29,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:36:29,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:29,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:29,697 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:36:29,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:36:29,697 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:29,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:29,705 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:36:29,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:36:29,705 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:29,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:29,715 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:29,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:36:29,717 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:29,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:29,727 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:29,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:36:29,730 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:29,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:29,740 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:29,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:36:29,741 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:29,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:29,749 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:36:29,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:36:29,749 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:29,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:29,759 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:29,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:36:29,760 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:29,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:29,769 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:36:29,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-09 18:36:29,769 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:29,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:29,779 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:29,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:36:29,783 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:29,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:29,791 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:36:29,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:36:29,792 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:29,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:29,800 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:36:29,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:36:29,800 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:29,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:29,811 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:36:29,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:36:29,812 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:29,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:29,821 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:36:29,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:36:29,823 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:29,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:29,833 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:36:29,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:36:29,834 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:29,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:29,840 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:36:29,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:36:29,841 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:29,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:29,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:36:29,911 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-07-09 18:36:30,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:30,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921855826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:30,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:30,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:36:30,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475949753] [2021-07-09 18:36:30,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:36:30,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:30,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:36:30,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:36:30,088 INFO L87 Difference]: Start difference. First operand 1579 states and 5293 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:31,580 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 64 [2021-07-09 18:36:31,746 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2021-07-09 18:36:32,047 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-07-09 18:36:32,266 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-07-09 18:36:32,531 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2021-07-09 18:36:32,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:32,579 INFO L93 Difference]: Finished difference Result 2206 states and 7151 transitions. [2021-07-09 18:36:32,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:36:32,579 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:36:32,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:32,583 INFO L225 Difference]: With dead ends: 2206 [2021-07-09 18:36:32,583 INFO L226 Difference]: Without dead ends: 2187 [2021-07-09 18:36:32,583 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 2648.9ms TimeCoverageRelationStatistics Valid=286, Invalid=1354, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:36:32,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2021-07-09 18:36:32,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 1585. [2021-07-09 18:36:32,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 3.352272727272727) internal successors, (5310), 1584 states have internal predecessors, (5310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:32,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 5310 transitions. [2021-07-09 18:36:32,605 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 5310 transitions. Word has length 26 [2021-07-09 18:36:32,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:32,605 INFO L482 AbstractCegarLoop]: Abstraction has 1585 states and 5310 transitions. [2021-07-09 18:36:32,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:32,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 5310 transitions. [2021-07-09 18:36:32,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:36:32,607 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:32,607 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:36:32,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1470,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:32,808 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:32,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:32,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1896922042, now seen corresponding path program 44 times [2021-07-09 18:36:32,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:32,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170278658] [2021-07-09 18:36:32,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:32,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:33,236 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:33,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:33,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170278658] [2021-07-09 18:36:33,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170278658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:33,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96165903] [2021-07-09 18:36:33,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:33,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:36:33,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:36:33,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 18:36:33,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:33,612 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-07-09 18:36:33,930 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_118, A], 5=[v_prenex_120, v_prenex_116]} [2021-07-09 18:36:33,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:33,951 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:36:33,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:36:33,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:33,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:33,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:33,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-09 18:36:33,974 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:34,138 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-07-09 18:36:34,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:34,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:34,162 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:36:34,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:36:34,163 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:34,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:34,183 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:36:34,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:36:34,186 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:34,334 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-07-09 18:36:34,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:34,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:34,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:34,355 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:36:34,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 18:36:34,356 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:34,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:34,370 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:34,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:36:34,375 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:34,508 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-07-09 18:36:34,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:34,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:34,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:34,531 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:36:34,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-07-09 18:36:34,533 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:34,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:34,550 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:36:34,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-07-09 18:36:34,552 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:34,671 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-07-09 18:36:34,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:34,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:36:34,683 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:393, output treesize:161 [2021-07-09 18:36:34,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:34,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96165903] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:34,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:34,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:36:34,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480994454] [2021-07-09 18:36:34,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:36:34,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:34,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:36:34,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:36:34,825 INFO L87 Difference]: Start difference. First operand 1585 states and 5310 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:35,476 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 43 [2021-07-09 18:36:37,192 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 46 [2021-07-09 18:36:37,646 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2021-07-09 18:36:37,816 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2021-07-09 18:36:38,410 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2021-07-09 18:36:38,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:38,810 INFO L93 Difference]: Finished difference Result 2573 states and 8159 transitions. [2021-07-09 18:36:38,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:36:38,811 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:36:38,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:38,815 INFO L225 Difference]: With dead ends: 2573 [2021-07-09 18:36:38,815 INFO L226 Difference]: Without dead ends: 2529 [2021-07-09 18:36:38,816 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 4107.7ms TimeCoverageRelationStatistics Valid=671, Invalid=3361, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:36:38,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2529 states. [2021-07-09 18:36:38,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2529 to 1585. [2021-07-09 18:36:38,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 3.352272727272727) internal successors, (5310), 1584 states have internal predecessors, (5310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:38,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 5310 transitions. [2021-07-09 18:36:38,841 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 5310 transitions. Word has length 26 [2021-07-09 18:36:38,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:38,841 INFO L482 AbstractCegarLoop]: Abstraction has 1585 states and 5310 transitions. [2021-07-09 18:36:38,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:38,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 5310 transitions. [2021-07-09 18:36:38,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:36:38,843 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:38,843 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:36:39,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1487 [2021-07-09 18:36:39,044 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:39,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:39,044 INFO L82 PathProgramCache]: Analyzing trace with hash 920603198, now seen corresponding path program 45 times [2021-07-09 18:36:39,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:39,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377759232] [2021-07-09 18:36:39,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:39,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:39,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:39,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:39,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377759232] [2021-07-09 18:36:39,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377759232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:39,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885873467] [2021-07-09 18:36:39,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:39,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:36:39,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:36:39,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:36:39,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:40,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,041 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 18:36:40,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 33 [2021-07-09 18:36:40,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:40,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,070 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:40,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-07-09 18:36:40,078 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:40,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,103 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-07-09 18:36:40,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 25 [2021-07-09 18:36:40,105 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:40,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,130 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-07-09 18:36:40,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 26 [2021-07-09 18:36:40,132 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:40,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,149 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:36:40,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-09 18:36:40,150 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:40,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,167 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:36:40,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-09 18:36:40,167 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:40,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,183 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:36:40,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-09 18:36:40,184 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:40,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,201 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:36:40,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-07-09 18:36:40,201 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:40,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,226 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-07-09 18:36:40,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-07-09 18:36:40,227 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:40,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,252 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-07-09 18:36:40,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 25 [2021-07-09 18:36:40,253 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:40,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,270 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:36:40,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 1 [2021-07-09 18:36:40,271 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:40,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,288 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:36:40,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-09 18:36:40,289 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:40,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,305 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:36:40,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-09 18:36:40,306 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:40,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,330 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-07-09 18:36:40,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 25 [2021-07-09 18:36:40,332 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:40,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,351 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:36:40,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-07-09 18:36:40,352 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:40,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:40,362 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:36:40,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-07-09 18:36:40,362 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:40,485 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-07-09 18:36:40,485 INFO L628 ElimStorePlain]: treesize reduction 76, result has 67.7 percent of original size [2021-07-09 18:36:40,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:36:40,488 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:953, output treesize:180 [2021-07-09 18:36:40,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:40,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885873467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:40,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:40,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-07-09 18:36:40,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542164030] [2021-07-09 18:36:40,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:36:40,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:40,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:36:40,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:36:40,630 INFO L87 Difference]: Start difference. First operand 1585 states and 5310 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:41,723 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-07-09 18:36:42,145 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-07-09 18:36:43,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:43,499 INFO L93 Difference]: Finished difference Result 3102 states and 9804 transitions. [2021-07-09 18:36:43,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:36:43,499 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:36:43,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:43,503 INFO L225 Difference]: With dead ends: 3102 [2021-07-09 18:36:43,503 INFO L226 Difference]: Without dead ends: 3072 [2021-07-09 18:36:43,504 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 2948.3ms TimeCoverageRelationStatistics Valid=533, Invalid=3007, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:36:43,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3072 states. [2021-07-09 18:36:43,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3072 to 1645. [2021-07-09 18:36:43,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1645 states, 1644 states have (on average 3.3619221411192215) internal successors, (5527), 1644 states have internal predecessors, (5527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:43,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 5527 transitions. [2021-07-09 18:36:43,532 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 5527 transitions. Word has length 26 [2021-07-09 18:36:43,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:43,532 INFO L482 AbstractCegarLoop]: Abstraction has 1645 states and 5527 transitions. [2021-07-09 18:36:43,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:43,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 5527 transitions. [2021-07-09 18:36:43,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:36:43,534 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:43,534 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:36:43,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1555 [2021-07-09 18:36:43,737 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:43,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:43,737 INFO L82 PathProgramCache]: Analyzing trace with hash 2122915566, now seen corresponding path program 46 times [2021-07-09 18:36:43,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:43,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731544918] [2021-07-09 18:36:43,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:43,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:44,170 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:44,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:44,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731544918] [2021-07-09 18:36:44,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731544918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:44,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222008035] [2021-07-09 18:36:44,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:44,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:36:44,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:36:44,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:36:44,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:44,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:44,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:44,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-09 18:36:44,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:44,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:44,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:44,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:36:44,705 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:44,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:44,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:44,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-09 18:36:44,713 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:44,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:44,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:44,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:36:44,729 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:44,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:44,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:44,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:36:44,737 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:44,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:44,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:44,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:36:44,744 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:44,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:44,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:44,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:36:44,752 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:44,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:44,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:44,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:36:44,759 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:44,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:44,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:44,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-09 18:36:44,767 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:44,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:44,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:44,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:36:44,775 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:44,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:44,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:44,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:36:44,782 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:44,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:44,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:44,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-09 18:36:44,790 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:44,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:44,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:44,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:36:44,799 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:44,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:44,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:44,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:36:44,807 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:44,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:44,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:44,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:44,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-09 18:36:44,822 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:44,851 INFO L628 ElimStorePlain]: treesize reduction 18, result has 60.0 percent of original size [2021-07-09 18:36:44,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:36:44,852 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-09 18:36:44,874 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:44,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222008035] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:44,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:44,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-07-09 18:36:44,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835963510] [2021-07-09 18:36:44,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:36:44,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:44,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:36:44,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:36:44,875 INFO L87 Difference]: Start difference. First operand 1645 states and 5527 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:46,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:46,959 INFO L93 Difference]: Finished difference Result 3253 states and 10418 transitions. [2021-07-09 18:36:46,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:36:46,960 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:36:46,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:46,966 INFO L225 Difference]: With dead ends: 3253 [2021-07-09 18:36:46,966 INFO L226 Difference]: Without dead ends: 3217 [2021-07-09 18:36:46,966 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 2048.1ms TimeCoverageRelationStatistics Valid=449, Invalid=2001, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:36:46,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3217 states. [2021-07-09 18:36:46,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3217 to 1763. [2021-07-09 18:36:46,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1762 states have (on average 3.388195232690125) internal successors, (5970), 1762 states have internal predecessors, (5970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:46,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 5970 transitions. [2021-07-09 18:36:46,997 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 5970 transitions. Word has length 26 [2021-07-09 18:36:46,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:46,997 INFO L482 AbstractCegarLoop]: Abstraction has 1763 states and 5970 transitions. [2021-07-09 18:36:46,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:46,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 5970 transitions. [2021-07-09 18:36:47,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:36:47,000 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:47,000 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:36:47,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1661 [2021-07-09 18:36:47,200 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:47,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:47,201 INFO L82 PathProgramCache]: Analyzing trace with hash -338403078, now seen corresponding path program 47 times [2021-07-09 18:36:47,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:47,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707414465] [2021-07-09 18:36:47,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:47,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:47,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:47,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:47,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707414465] [2021-07-09 18:36:47,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707414465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:47,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454152398] [2021-07-09 18:36:47,576 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:47,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:36:47,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:36:47,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:36:47,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:48,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:48,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:48,047 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-09 18:36:48,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 31 [2021-07-09 18:36:48,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:48,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:48,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:48,071 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-07-09 18:36:48,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 28 [2021-07-09 18:36:48,073 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:48,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:48,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:48,098 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-09 18:36:48,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-07-09 18:36:48,102 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:48,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:48,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:48,123 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-09 18:36:48,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 28 [2021-07-09 18:36:48,125 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:48,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:48,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:48,146 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-07-09 18:36:48,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-07-09 18:36:48,147 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:48,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:48,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:48,162 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:36:48,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-09 18:36:48,163 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:48,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:48,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:48,187 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 18:36:48,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-07-09 18:36:48,190 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:48,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:48,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:48,212 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-07-09 18:36:48,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 26 [2021-07-09 18:36:48,214 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:48,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:48,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:48,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:48,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-07-09 18:36:48,242 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:48,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:48,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:48,265 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-07-09 18:36:48,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-07-09 18:36:48,267 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:48,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:48,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:48,289 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-07-09 18:36:48,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-07-09 18:36:48,290 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:48,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:48,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:48,313 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-07-09 18:36:48,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 25 [2021-07-09 18:36:48,314 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:48,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:48,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:48,329 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:36:48,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-07-09 18:36:48,330 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:48,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:48,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:48,343 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:36:48,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-09 18:36:48,344 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:48,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:48,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:48,358 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:36:48,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-09 18:36:48,358 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:48,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:48,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:48,367 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:36:48,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-09 18:36:48,367 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:48,480 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2021-07-09 18:36:48,480 INFO L628 ElimStorePlain]: treesize reduction 163, result has 39.9 percent of original size [2021-07-09 18:36:48,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:36:48,482 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:90 [2021-07-09 18:36:48,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:48,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454152398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:48,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:48,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-07-09 18:36:48,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293407458] [2021-07-09 18:36:48,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:36:48,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:48,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:36:48,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:36:48,561 INFO L87 Difference]: Start difference. First operand 1763 states and 5970 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:50,624 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-07-09 18:36:51,134 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2021-07-09 18:36:51,339 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2021-07-09 18:36:51,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:51,566 INFO L93 Difference]: Finished difference Result 3738 states and 11851 transitions. [2021-07-09 18:36:51,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:36:51,566 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:36:51,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:51,571 INFO L225 Difference]: With dead ends: 3738 [2021-07-09 18:36:51,572 INFO L226 Difference]: Without dead ends: 3681 [2021-07-09 18:36:51,572 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 2914.1ms TimeCoverageRelationStatistics Valid=639, Invalid=2553, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:36:51,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3681 states. [2021-07-09 18:36:51,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3681 to 1801. [2021-07-09 18:36:51,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1801 states, 1800 states have (on average 3.397777777777778) internal successors, (6116), 1800 states have internal predecessors, (6116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:51,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 6116 transitions. [2021-07-09 18:36:51,605 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 6116 transitions. Word has length 26 [2021-07-09 18:36:51,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:51,605 INFO L482 AbstractCegarLoop]: Abstraction has 1801 states and 6116 transitions. [2021-07-09 18:36:51,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:51,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 6116 transitions. [2021-07-09 18:36:51,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:36:51,607 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:51,607 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:36:51,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1767,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:51,820 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:51,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:51,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1512099618, now seen corresponding path program 27 times [2021-07-09 18:36:51,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:51,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772718756] [2021-07-09 18:36:51,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:51,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:52,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:52,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:52,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772718756] [2021-07-09 18:36:52,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772718756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:52,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937557566] [2021-07-09 18:36:52,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:36:52,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:36:52,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:52,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:36:52,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:52,803 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-07-09 18:36:53,032 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-07-09 18:36:53,162 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:36:53,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:36:53,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:53,286 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-07-09 18:36:53,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:53,302 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:53,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:36:53,305 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:53,439 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-07-09 18:36:53,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:53,460 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:36:53,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:36:53,462 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:53,605 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-07-09 18:36:53,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:53,624 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:36:53,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:36:53,628 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:53,753 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-07-09 18:36:53,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:53,768 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:53,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-09 18:36:53,772 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:53,892 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-07-09 18:36:53,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:53,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:53,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:36:53,909 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:54,035 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-07-09 18:36:54,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:54,054 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:36:54,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-07-09 18:36:54,058 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:54,179 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-07-09 18:36:54,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:54,195 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:36:54,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:36:54,196 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:54,311 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-07-09 18:36:54,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:54,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:36:54,323 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:365, output treesize:357 [2021-07-09 18:36:54,531 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-07-09 18:36:54,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:54,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937557566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:54,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:54,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-09 18:36:54,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36552502] [2021-07-09 18:36:54,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:36:54,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:54,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:36:54,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:36:54,646 INFO L87 Difference]: Start difference. First operand 1801 states and 6116 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:55,499 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-07-09 18:36:55,695 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-07-09 18:36:56,171 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-07-09 18:36:56,392 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-07-09 18:36:56,616 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-07-09 18:36:57,080 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 84 [2021-07-09 18:36:57,453 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 77 [2021-07-09 18:36:58,019 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 67 [2021-07-09 18:36:58,464 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2021-07-09 18:36:58,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:58,644 INFO L93 Difference]: Finished difference Result 2391 states and 7895 transitions. [2021-07-09 18:36:58,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:36:58,644 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:36:58,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:58,648 INFO L225 Difference]: With dead ends: 2391 [2021-07-09 18:36:58,649 INFO L226 Difference]: Without dead ends: 2361 [2021-07-09 18:36:58,649 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 4358.7ms TimeCoverageRelationStatistics Valid=268, Invalid=1454, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:36:58,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-07-09 18:36:58,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 1809. [2021-07-09 18:36:58,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1808 states have (on average 3.396017699115044) internal successors, (6140), 1808 states have internal predecessors, (6140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:58,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 6140 transitions. [2021-07-09 18:36:58,674 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 6140 transitions. Word has length 26 [2021-07-09 18:36:58,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:58,674 INFO L482 AbstractCegarLoop]: Abstraction has 1809 states and 6140 transitions. [2021-07-09 18:36:58,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:58,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 6140 transitions. [2021-07-09 18:36:58,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:36:58,676 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:58,676 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:36:58,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1866 [2021-07-09 18:36:58,877 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:58,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:58,877 INFO L82 PathProgramCache]: Analyzing trace with hash -105433162, now seen corresponding path program 28 times [2021-07-09 18:36:58,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:58,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928227914] [2021-07-09 18:36:58,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:58,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:59,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:59,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928227914] [2021-07-09 18:36:59,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928227914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:59,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325539953] [2021-07-09 18:36:59,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:59,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:36:59,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:36:59,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:36:59,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:59,559 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-07-09 18:36:59,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:59,616 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:59,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:36:59,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:59,722 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-07-09 18:36:59,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:59,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:59,735 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:36:59,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:36:59,736 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:59,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:59,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:59,846 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:59,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:36:59,849 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:59,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:59,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:59,954 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:59,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:36:59,956 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:00,060 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-07-09 18:37:00,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:00,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:00,071 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:37:00,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:37:00,072 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:00,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:00,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:00,175 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:00,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:37:00,177 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:00,277 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-07-09 18:37:00,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:00,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:00,290 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:00,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:37:00,291 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:00,393 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-07-09 18:37:00,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:00,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:00,406 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:37:00,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:37:00,407 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:00,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:00,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:37:00,512 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-07-09 18:37:00,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:00,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325539953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:00,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:00,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:37:00,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532345013] [2021-07-09 18:37:00,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:37:00,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:00,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:37:00,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:37:00,706 INFO L87 Difference]: Start difference. First operand 1809 states and 6140 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:01,006 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-07-09 18:37:01,476 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-07-09 18:37:01,987 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-07-09 18:37:02,239 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-07-09 18:37:02,692 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2021-07-09 18:37:02,882 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-07-09 18:37:03,124 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-07-09 18:37:03,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:03,219 INFO L93 Difference]: Finished difference Result 2637 states and 8679 transitions. [2021-07-09 18:37:03,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:37:03,220 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:37:03,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:03,224 INFO L225 Difference]: With dead ends: 2637 [2021-07-09 18:37:03,224 INFO L226 Difference]: Without dead ends: 2603 [2021-07-09 18:37:03,225 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 2738.3ms TimeCoverageRelationStatistics Valid=303, Invalid=1179, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:37:03,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2021-07-09 18:37:03,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 1822. [2021-07-09 18:37:03,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1821 states have (on average 3.402526084568918) internal successors, (6196), 1821 states have internal predecessors, (6196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:03,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 6196 transitions. [2021-07-09 18:37:03,260 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 6196 transitions. Word has length 26 [2021-07-09 18:37:03,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:03,261 INFO L482 AbstractCegarLoop]: Abstraction has 1822 states and 6196 transitions. [2021-07-09 18:37:03,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:03,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 6196 transitions. [2021-07-09 18:37:03,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:37:03,263 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:03,263 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:03,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1893,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:03,464 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:03,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:03,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1795376066, now seen corresponding path program 29 times [2021-07-09 18:37:03,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:03,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000867728] [2021-07-09 18:37:03,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:03,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:03,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:03,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:03,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000867728] [2021-07-09 18:37:03,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000867728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:03,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407884371] [2021-07-09 18:37:03,732 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:03,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:37:03,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:03,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:37:03,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:04,225 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_156, v_prenex_158], 6=[v_prenex_157]} [2021-07-09 18:37:04,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:04,247 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:37:04,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:37:04,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:04,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:04,269 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:37:04,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:37:04,271 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:04,420 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-07-09 18:37:04,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:04,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:04,437 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:04,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-09 18:37:04,442 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:04,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:04,459 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:37:04,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:37:04,461 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:04,603 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-07-09 18:37:04,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:04,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:04,621 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:04,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:37:04,624 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:04,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:04,642 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:37:04,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-07-09 18:37:04,644 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:04,911 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2021-07-09 18:37:04,911 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.4 percent of original size [2021-07-09 18:37:04,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:04,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:04,932 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:37:04,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:37:04,933 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:04,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:04,946 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:04,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 32 [2021-07-09 18:37:04,951 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:05,203 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-07-09 18:37:05,203 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.8 percent of original size [2021-07-09 18:37:05,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:37:05,221 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:373, output treesize:323 [2021-07-09 18:37:05,418 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-07-09 18:37:05,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:05,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407884371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:05,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:05,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:37:05,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862429928] [2021-07-09 18:37:05,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:37:05,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:05,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:37:05,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:37:05,511 INFO L87 Difference]: Start difference. First operand 1822 states and 6196 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:05,651 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 27 [2021-07-09 18:37:06,404 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2021-07-09 18:37:07,481 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2021-07-09 18:37:07,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:07,527 INFO L93 Difference]: Finished difference Result 2416 states and 8045 transitions. [2021-07-09 18:37:07,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:37:07,527 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:37:07,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:07,532 INFO L225 Difference]: With dead ends: 2416 [2021-07-09 18:37:07,532 INFO L226 Difference]: Without dead ends: 2391 [2021-07-09 18:37:07,532 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 2250.4ms TimeCoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:37:07,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-07-09 18:37:07,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1822. [2021-07-09 18:37:07,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1821 states have (on average 3.402526084568918) internal successors, (6196), 1821 states have internal predecessors, (6196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:07,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 6196 transitions. [2021-07-09 18:37:07,559 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 6196 transitions. Word has length 26 [2021-07-09 18:37:07,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:07,559 INFO L482 AbstractCegarLoop]: Abstraction has 1822 states and 6196 transitions. [2021-07-09 18:37:07,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:07,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 6196 transitions. [2021-07-09 18:37:07,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:37:07,561 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:07,561 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:07,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1909 [2021-07-09 18:37:07,762 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:07,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:07,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1102392532, now seen corresponding path program 48 times [2021-07-09 18:37:07,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:07,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155728114] [2021-07-09 18:37:07,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:07,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:08,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:08,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:08,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155728114] [2021-07-09 18:37:08,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155728114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:08,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944179064] [2021-07-09 18:37:08,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:08,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:37:08,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:08,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:37:08,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:08,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-07-09 18:37:08,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:08,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:37:08,671 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:08,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-07-09 18:37:08,679 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:08,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-07-09 18:37:08,688 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:08,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-07-09 18:37:08,696 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:08,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:37:08,705 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:08,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:37:08,713 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:08,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 19 [2021-07-09 18:37:08,722 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:08,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-07-09 18:37:08,730 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:08,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:37:08,739 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:08,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:37:08,747 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:08,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:37:08,755 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:08,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-07-09 18:37:08,764 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:08,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:37:08,772 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:08,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:37:08,781 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:08,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:08,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:08,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:37:08,787 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:08,838 INFO L628 ElimStorePlain]: treesize reduction 223, result has 12.9 percent of original size [2021-07-09 18:37:08,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:37:08,840 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:21 [2021-07-09 18:37:08,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:08,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944179064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:08,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:08,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-09 18:37:08,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16960041] [2021-07-09 18:37:08,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:37:08,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:08,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:37:08,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:37:08,868 INFO L87 Difference]: Start difference. First operand 1822 states and 6196 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:09,371 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 44 [2021-07-09 18:37:10,458 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-07-09 18:37:10,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:10,513 INFO L93 Difference]: Finished difference Result 2280 states and 7549 transitions. [2021-07-09 18:37:10,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:37:10,514 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:37:10,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:10,517 INFO L225 Difference]: With dead ends: 2280 [2021-07-09 18:37:10,517 INFO L226 Difference]: Without dead ends: 2258 [2021-07-09 18:37:10,517 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 1902.6ms TimeCoverageRelationStatistics Valid=326, Invalid=1314, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:37:10,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2258 states. [2021-07-09 18:37:10,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2258 to 1818. [2021-07-09 18:37:10,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.4012107870115575) internal successors, (6180), 1817 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:10,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 6180 transitions. [2021-07-09 18:37:10,540 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 6180 transitions. Word has length 26 [2021-07-09 18:37:10,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:10,540 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 6180 transitions. [2021-07-09 18:37:10,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:10,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 6180 transitions. [2021-07-09 18:37:10,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:37:10,542 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:10,543 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:10,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1965 [2021-07-09 18:37:10,743 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:10,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:10,743 INFO L82 PathProgramCache]: Analyzing trace with hash 2027886398, now seen corresponding path program 49 times [2021-07-09 18:37:10,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:10,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087175355] [2021-07-09 18:37:10,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:10,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:11,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:11,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:11,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087175355] [2021-07-09 18:37:11,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087175355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:11,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084885908] [2021-07-09 18:37:11,187 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:11,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:11,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:37:11,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:11,542 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_161], 5=[v_prenex_163, v_prenex_159]} [2021-07-09 18:37:11,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:11,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:11,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:11,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:11,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-09 18:37:11,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:11,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:11,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:11,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:11,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:37:11,557 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:11,634 INFO L628 ElimStorePlain]: treesize reduction 141, result has 40.8 percent of original size [2021-07-09 18:37:11,634 INFO L518 ElimStorePlain]: Eliminatee v_prenex_161 vanished before elimination [2021-07-09 18:37:11,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:11,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:37:11,638 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:11,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:11,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:11,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:11,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:11,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:11,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:37:11,669 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:11,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:11,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:37:11,693 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:294, output treesize:43 [2021-07-09 18:37:11,738 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:11,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084885908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:11,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:11,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-09 18:37:11,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946516892] [2021-07-09 18:37:11,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:37:11,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:11,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:37:11,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:37:11,739 INFO L87 Difference]: Start difference. First operand 1818 states and 6180 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:12,269 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 40 [2021-07-09 18:37:13,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:13,499 INFO L93 Difference]: Finished difference Result 2473 states and 8184 transitions. [2021-07-09 18:37:13,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:37:13,500 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:37:13,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:13,504 INFO L225 Difference]: With dead ends: 2473 [2021-07-09 18:37:13,504 INFO L226 Difference]: Without dead ends: 2458 [2021-07-09 18:37:13,504 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 2045.8ms TimeCoverageRelationStatistics Valid=327, Invalid=1313, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:37:13,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2021-07-09 18:37:13,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 1818. [2021-07-09 18:37:13,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.4012107870115575) internal successors, (6180), 1817 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:13,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 6180 transitions. [2021-07-09 18:37:13,531 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 6180 transitions. Word has length 26 [2021-07-09 18:37:13,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:13,531 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 6180 transitions. [2021-07-09 18:37:13,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:13,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 6180 transitions. [2021-07-09 18:37:13,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:37:13,533 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:13,533 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:13,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2055,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:13,734 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:13,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:13,734 INFO L82 PathProgramCache]: Analyzing trace with hash 849981858, now seen corresponding path program 50 times [2021-07-09 18:37:13,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:13,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179901226] [2021-07-09 18:37:13,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:13,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:14,140 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:14,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:14,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179901226] [2021-07-09 18:37:14,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179901226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:14,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230009444] [2021-07-09 18:37:14,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:14,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:37:14,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:14,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 18:37:14,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:14,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:14,709 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-07-09 18:37:14,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 52 [2021-07-09 18:37:14,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:14,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:14,755 INFO L354 Elim1Store]: treesize reduction 20, result has 55.6 percent of original size [2021-07-09 18:37:14,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 40 [2021-07-09 18:37:14,757 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:14,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:14,799 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-07-09 18:37:14,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 51 [2021-07-09 18:37:14,802 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:14,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:14,851 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-07-09 18:37:14,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 55 [2021-07-09 18:37:14,858 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:14,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:14,903 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-07-09 18:37:14,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 47 [2021-07-09 18:37:14,906 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:14,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:14,948 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-07-09 18:37:14,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 44 [2021-07-09 18:37:14,954 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:14,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:15,000 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-07-09 18:37:15,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 52 [2021-07-09 18:37:15,010 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:15,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:15,056 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-07-09 18:37:15,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 51 [2021-07-09 18:37:15,060 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:15,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:15,094 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:15,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 57 [2021-07-09 18:37:15,112 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:15,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:15,159 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-07-09 18:37:15,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 55 [2021-07-09 18:37:15,165 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:15,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:15,201 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:15,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 63 [2021-07-09 18:37:15,213 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:15,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:15,232 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-09 18:37:15,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-07-09 18:37:15,233 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:15,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:15,273 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-07-09 18:37:15,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 44 [2021-07-09 18:37:15,278 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:15,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:15,312 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-09 18:37:15,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-07-09 18:37:15,313 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:15,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:15,348 INFO L354 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-07-09 18:37:15,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 37 [2021-07-09 18:37:15,349 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:15,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:15,361 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-09 18:37:15,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 1 [2021-07-09 18:37:15,362 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:15,803 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 47 [2021-07-09 18:37:15,803 INFO L628 ElimStorePlain]: treesize reduction 411, result has 45.1 percent of original size [2021-07-09 18:37:15,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:37:15,811 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:945, output treesize:389 [2021-07-09 18:37:16,081 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 37 [2021-07-09 18:37:16,182 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:16,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230009444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:16,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:16,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-07-09 18:37:16,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447340671] [2021-07-09 18:37:16,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:37:16,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:16,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:37:16,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:37:16,183 INFO L87 Difference]: Start difference. First operand 1818 states and 6180 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:16,812 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 48 [2021-07-09 18:37:17,306 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-07-09 18:37:17,777 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-07-09 18:37:17,992 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-07-09 18:37:18,266 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-07-09 18:37:18,833 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-07-09 18:37:19,379 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-07-09 18:37:19,683 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-07-09 18:37:19,894 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2021-07-09 18:37:20,116 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 48 [2021-07-09 18:37:20,294 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2021-07-09 18:37:20,727 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-07-09 18:37:20,989 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2021-07-09 18:37:21,224 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-07-09 18:37:21,693 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2021-07-09 18:37:22,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:22,364 INFO L93 Difference]: Finished difference Result 3328 states and 10546 transitions. [2021-07-09 18:37:22,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 18:37:22,364 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:37:22,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:22,369 INFO L225 Difference]: With dead ends: 3328 [2021-07-09 18:37:22,369 INFO L226 Difference]: Without dead ends: 3272 [2021-07-09 18:37:22,370 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1613 ImplicationChecksByTransitivity, 6142.5ms TimeCoverageRelationStatistics Valid=856, Invalid=4400, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 18:37:22,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2021-07-09 18:37:22,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 1831. [2021-07-09 18:37:22,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1831 states, 1830 states have (on average 3.40327868852459) internal successors, (6228), 1830 states have internal predecessors, (6228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:22,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 6228 transitions. [2021-07-09 18:37:22,400 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 6228 transitions. Word has length 26 [2021-07-09 18:37:22,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:22,400 INFO L482 AbstractCegarLoop]: Abstraction has 1831 states and 6228 transitions. [2021-07-09 18:37:22,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:22,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 6228 transitions. [2021-07-09 18:37:22,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:37:22,405 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:22,405 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:22,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2069,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:22,605 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:22,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:22,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1044384706, now seen corresponding path program 51 times [2021-07-09 18:37:22,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:22,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441057579] [2021-07-09 18:37:22,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:22,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:22,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:22,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:22,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441057579] [2021-07-09 18:37:22,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441057579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:22,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344067571] [2021-07-09 18:37:22,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:23,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:37:23,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:23,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:37:23,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:23,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:23,595 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-07-09 18:37:23,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 52 [2021-07-09 18:37:23,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:23,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:23,649 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-07-09 18:37:23,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 55 [2021-07-09 18:37:23,654 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:23,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:23,690 INFO L354 Elim1Store]: treesize reduction 27, result has 40.0 percent of original size [2021-07-09 18:37:23,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 36 [2021-07-09 18:37:23,691 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:23,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:23,740 INFO L354 Elim1Store]: treesize reduction 4, result has 91.1 percent of original size [2021-07-09 18:37:23,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 59 [2021-07-09 18:37:23,749 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:23,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:23,769 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-09 18:37:23,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-07-09 18:37:23,769 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:23,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:23,811 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-07-09 18:37:23,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 44 [2021-07-09 18:37:23,817 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:23,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:23,852 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:23,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 57 [2021-07-09 18:37:23,870 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:23,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:23,909 INFO L354 Elim1Store]: treesize reduction 21, result has 53.3 percent of original size [2021-07-09 18:37:23,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 42 [2021-07-09 18:37:23,911 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:23,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:23,956 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-07-09 18:37:23,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 52 [2021-07-09 18:37:23,964 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:23,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:24,005 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-07-09 18:37:24,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 44 [2021-07-09 18:37:24,010 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:24,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:24,028 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-09 18:37:24,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 1 [2021-07-09 18:37:24,029 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:24,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:24,061 INFO L354 Elim1Store]: treesize reduction 34, result has 24.4 percent of original size [2021-07-09 18:37:24,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 29 [2021-07-09 18:37:24,062 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:24,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:24,080 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-09 18:37:24,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 1 [2021-07-09 18:37:24,081 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:24,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:24,099 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-09 18:37:24,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 1 [2021-07-09 18:37:24,099 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:24,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:24,150 INFO L354 Elim1Store]: treesize reduction 15, result has 66.7 percent of original size [2021-07-09 18:37:24,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 48 [2021-07-09 18:37:24,152 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:24,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:24,163 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-09 18:37:24,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-07-09 18:37:24,164 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:24,628 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-07-09 18:37:24,629 INFO L628 ElimStorePlain]: treesize reduction 174, result has 69.4 percent of original size [2021-07-09 18:37:24,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-07-09 18:37:24,635 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:993, output treesize:461 [2021-07-09 18:37:24,917 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-07-09 18:37:25,202 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-07-09 18:37:25,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:25,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344067571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:25,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:25,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 18:37:25,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945722550] [2021-07-09 18:37:25,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:37:25,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:25,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:37:25,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:37:25,332 INFO L87 Difference]: Start difference. First operand 1831 states and 6228 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:26,061 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 44 [2021-07-09 18:37:26,258 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-07-09 18:37:27,195 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2021-07-09 18:37:27,565 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-07-09 18:37:27,688 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-07-09 18:37:27,842 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-07-09 18:37:27,973 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-07-09 18:37:28,138 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-07-09 18:37:28,547 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-07-09 18:37:28,999 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-07-09 18:37:29,289 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-07-09 18:37:29,583 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-07-09 18:37:29,913 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 44 [2021-07-09 18:37:30,395 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2021-07-09 18:37:30,565 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 39 [2021-07-09 18:37:31,250 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 64 [2021-07-09 18:37:31,631 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2021-07-09 18:37:31,979 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-07-09 18:37:32,430 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-07-09 18:37:32,714 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 46 [2021-07-09 18:37:33,194 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2021-07-09 18:37:33,491 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 37 [2021-07-09 18:37:33,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:33,615 INFO L93 Difference]: Finished difference Result 3152 states and 10146 transitions. [2021-07-09 18:37:33,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 18:37:33,615 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:37:33,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:33,620 INFO L225 Difference]: With dead ends: 3152 [2021-07-09 18:37:33,620 INFO L226 Difference]: Without dead ends: 3089 [2021-07-09 18:37:33,621 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1505 ImplicationChecksByTransitivity, 8559.8ms TimeCoverageRelationStatistics Valid=867, Invalid=4103, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:37:33,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3089 states. [2021-07-09 18:37:33,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3089 to 1811. [2021-07-09 18:37:33,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1810 states have (on average 3.4027624309392266) internal successors, (6159), 1810 states have internal predecessors, (6159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:33,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 6159 transitions. [2021-07-09 18:37:33,650 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 6159 transitions. Word has length 26 [2021-07-09 18:37:33,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:33,650 INFO L482 AbstractCegarLoop]: Abstraction has 1811 states and 6159 transitions. [2021-07-09 18:37:33,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:33,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 6159 transitions. [2021-07-09 18:37:33,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:37:33,652 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:33,652 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:33,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2243 [2021-07-09 18:37:33,853 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:33,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:33,853 INFO L82 PathProgramCache]: Analyzing trace with hash -696255298, now seen corresponding path program 52 times [2021-07-09 18:37:33,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:33,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498186539] [2021-07-09 18:37:33,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:33,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:34,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:34,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:34,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498186539] [2021-07-09 18:37:34,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498186539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:34,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124847490] [2021-07-09 18:37:34,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:34,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:37:34,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:34,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:37:34,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:34,806 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2021-07-09 18:37:35,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,028 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:35,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-09 18:37:35,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:35,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,062 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-07-09 18:37:35,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-07-09 18:37:35,065 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:35,327 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-07-09 18:37:35,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:35,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,364 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-07-09 18:37:35,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 39 [2021-07-09 18:37:35,368 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:35,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,399 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-07-09 18:37:35,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 36 [2021-07-09 18:37:35,404 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:35,658 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-07-09 18:37:35,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:35,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,686 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-07-09 18:37:35,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:37:35,688 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:35,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:35,711 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-07-09 18:37:35,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 28 [2021-07-09 18:37:35,715 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:36,167 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 115 [2021-07-09 18:37:36,167 INFO L628 ElimStorePlain]: treesize reduction 38, result has 92.7 percent of original size [2021-07-09 18:37:36,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:36,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:36,196 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:36,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 43 [2021-07-09 18:37:36,201 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:36,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:36,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:36,231 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-07-09 18:37:36,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 39 [2021-07-09 18:37:36,237 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:36,638 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 110 [2021-07-09 18:37:36,638 INFO L628 ElimStorePlain]: treesize reduction 47, result has 90.4 percent of original size [2021-07-09 18:37:36,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:36,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:36,665 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:36,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 43 [2021-07-09 18:37:36,684 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:36,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:36,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:36,711 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-07-09 18:37:36,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 26 [2021-07-09 18:37:36,712 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:36,898 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-07-09 18:37:36,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:36,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:36,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:36,927 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-07-09 18:37:36,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2021-07-09 18:37:36,935 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:36,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:36,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:36,947 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-07-09 18:37:36,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 1 [2021-07-09 18:37:36,948 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:37,087 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-07-09 18:37:37,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:37,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 6 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-07-09 18:37:37,100 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 18 variables, input treesize:621, output treesize:257 [2021-07-09 18:37:37,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:37,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124847490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:37,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:37,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-09 18:37:37,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783232315] [2021-07-09 18:37:37,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:37:37,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:37,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:37:37,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:37:37,251 INFO L87 Difference]: Start difference. First operand 1811 states and 6159 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:38,388 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-07-09 18:37:39,223 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 94 [2021-07-09 18:37:39,707 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 97 [2021-07-09 18:37:40,238 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 102 [2021-07-09 18:37:40,371 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2021-07-09 18:37:40,645 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2021-07-09 18:37:40,804 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-07-09 18:37:41,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:41,232 INFO L93 Difference]: Finished difference Result 3034 states and 9904 transitions. [2021-07-09 18:37:41,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:37:41,232 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:37:41,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:41,237 INFO L225 Difference]: With dead ends: 3034 [2021-07-09 18:37:41,237 INFO L226 Difference]: Without dead ends: 2983 [2021-07-09 18:37:41,237 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 4103.5ms TimeCoverageRelationStatistics Valid=529, Invalid=2333, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:37:41,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2983 states. [2021-07-09 18:37:41,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2983 to 1871. [2021-07-09 18:37:41,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1871 states, 1870 states have (on average 3.411229946524064) internal successors, (6379), 1870 states have internal predecessors, (6379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:41,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 6379 transitions. [2021-07-09 18:37:41,267 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 6379 transitions. Word has length 26 [2021-07-09 18:37:41,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:41,267 INFO L482 AbstractCegarLoop]: Abstraction has 1871 states and 6379 transitions. [2021-07-09 18:37:41,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:41,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 6379 transitions. [2021-07-09 18:37:41,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:37:41,269 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:41,269 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:41,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2406,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:41,477 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:41,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:41,477 INFO L82 PathProgramCache]: Analyzing trace with hash 227092556, now seen corresponding path program 53 times [2021-07-09 18:37:41,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:41,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336844719] [2021-07-09 18:37:41,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:41,906 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:41,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:41,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336844719] [2021-07-09 18:37:41,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336844719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:41,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792059347] [2021-07-09 18:37:41,907 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:41,935 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:37:41,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:41,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:37:41,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:42,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-07-09 18:37:42,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:42,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-07-09 18:37:42,405 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:42,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-07-09 18:37:42,413 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:42,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:37:42,421 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:42,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:37:42,428 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:42,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:37:42,436 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:42,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-09 18:37:42,461 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:42,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-07-09 18:37:42,468 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:42,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-07-09 18:37:42,476 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:42,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-07-09 18:37:42,483 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:42,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:37:42,490 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:42,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:37:42,498 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:42,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-07-09 18:37:42,505 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:42,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-07-09 18:37:42,512 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:42,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-07-09 18:37:42,519 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:42,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:42,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-07-09 18:37:42,525 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:42,556 INFO L628 ElimStorePlain]: treesize reduction 38, result has 49.3 percent of original size [2021-07-09 18:37:42,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:37:42,557 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:27 [2021-07-09 18:37:42,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:42,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792059347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:42,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:42,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 18:37:42,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311932821] [2021-07-09 18:37:42,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:37:42,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:42,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:37:42,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:37:42,593 INFO L87 Difference]: Start difference. First operand 1871 states and 6379 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:43,839 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-07-09 18:37:43,968 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-07-09 18:37:44,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:44,069 INFO L93 Difference]: Finished difference Result 2487 states and 8126 transitions. [2021-07-09 18:37:44,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:37:44,070 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:37:44,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:44,074 INFO L225 Difference]: With dead ends: 2487 [2021-07-09 18:37:44,074 INFO L226 Difference]: Without dead ends: 2449 [2021-07-09 18:37:44,074 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1685.4ms TimeCoverageRelationStatistics Valid=316, Invalid=1244, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:37:44,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2449 states. [2021-07-09 18:37:44,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2449 to 1871. [2021-07-09 18:37:44,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1871 states, 1870 states have (on average 3.409090909090909) internal successors, (6375), 1870 states have internal predecessors, (6375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:44,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 6375 transitions. [2021-07-09 18:37:44,104 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 6375 transitions. Word has length 26 [2021-07-09 18:37:44,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:44,104 INFO L482 AbstractCegarLoop]: Abstraction has 1871 states and 6375 transitions. [2021-07-09 18:37:44,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:44,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 6375 transitions. [2021-07-09 18:37:44,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:37:44,107 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:44,107 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:44,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2491,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:44,313 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:44,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:44,313 INFO L82 PathProgramCache]: Analyzing trace with hash -538930356, now seen corresponding path program 54 times [2021-07-09 18:37:44,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:44,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943610194] [2021-07-09 18:37:44,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:44,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:44,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:44,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:44,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943610194] [2021-07-09 18:37:44,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943610194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:44,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664271327] [2021-07-09 18:37:44,737 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:44,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:37:44,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:44,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:37:44,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:44,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:44,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:44,998 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-07-09 18:37:44,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 31 [2021-07-09 18:37:45,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:45,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:45,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:45,055 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-07-09 18:37:45,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-07-09 18:37:45,059 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:45,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:45,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:45,091 INFO L354 Elim1Store]: treesize reduction 20, result has 25.9 percent of original size [2021-07-09 18:37:45,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 25 [2021-07-09 18:37:45,092 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:45,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:45,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:45,108 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:37:45,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-07-09 18:37:45,109 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:45,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:45,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:45,132 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-07-09 18:37:45,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 28 [2021-07-09 18:37:45,133 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:45,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:45,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:45,157 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-07-09 18:37:45,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 28 [2021-07-09 18:37:45,158 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:45,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:45,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:45,172 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:37:45,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-07-09 18:37:45,173 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:45,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:45,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:45,188 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:37:45,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-07-09 18:37:45,189 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:45,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:45,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:45,213 INFO L354 Elim1Store]: treesize reduction 19, result has 29.6 percent of original size [2021-07-09 18:37:45,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-07-09 18:37:45,215 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:45,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:45,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:45,231 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:37:45,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-07-09 18:37:45,232 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:45,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:45,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:45,256 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-07-09 18:37:45,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-07-09 18:37:45,258 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:45,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:45,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:45,272 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:37:45,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-07-09 18:37:45,272 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:45,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:45,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:45,294 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-07-09 18:37:45,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 18:37:45,296 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:45,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:45,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:45,317 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:45,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-07-09 18:37:45,324 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:45,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:45,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:45,346 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-07-09 18:37:45,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-07-09 18:37:45,347 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:45,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:45,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:45,356 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:37:45,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-07-09 18:37:45,357 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:45,450 INFO L628 ElimStorePlain]: treesize reduction 122, result has 43.3 percent of original size [2021-07-09 18:37:45,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:37:45,451 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:705, output treesize:93 [2021-07-09 18:37:45,549 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:45,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664271327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:45,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:45,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 18:37:45,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778129847] [2021-07-09 18:37:45,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:37:45,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:45,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:37:45,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:37:45,550 INFO L87 Difference]: Start difference. First operand 1871 states and 6375 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:45,995 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-07-09 18:37:46,456 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2021-07-09 18:37:46,880 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-07-09 18:37:46,998 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-07-09 18:37:47,307 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2021-07-09 18:37:48,032 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2021-07-09 18:37:48,340 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 53 [2021-07-09 18:37:48,556 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-07-09 18:37:48,839 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2021-07-09 18:37:49,004 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 59 [2021-07-09 18:37:49,204 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 59 [2021-07-09 18:37:49,435 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 57 [2021-07-09 18:37:49,698 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2021-07-09 18:37:49,910 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 54 [2021-07-09 18:37:50,176 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 62 [2021-07-09 18:37:50,479 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 62 [2021-07-09 18:37:50,767 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-07-09 18:37:51,086 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-07-09 18:37:51,283 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2021-07-09 18:37:51,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:51,469 INFO L93 Difference]: Finished difference Result 3107 states and 9967 transitions. [2021-07-09 18:37:51,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:37:51,469 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:37:51,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:51,474 INFO L225 Difference]: With dead ends: 3107 [2021-07-09 18:37:51,474 INFO L226 Difference]: Without dead ends: 3069 [2021-07-09 18:37:51,474 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 5748.2ms TimeCoverageRelationStatistics Valid=747, Invalid=2913, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:37:51,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3069 states. [2021-07-09 18:37:51,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3069 to 1881. [2021-07-09 18:37:51,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1880 states have (on average 3.4159574468085108) internal successors, (6422), 1880 states have internal predecessors, (6422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:51,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 6422 transitions. [2021-07-09 18:37:51,505 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 6422 transitions. Word has length 26 [2021-07-09 18:37:51,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:51,506 INFO L482 AbstractCegarLoop]: Abstraction has 1881 states and 6422 transitions. [2021-07-09 18:37:51,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:51,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 6422 transitions. [2021-07-09 18:37:51,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:37:51,508 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:51,508 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:51,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2587 [2021-07-09 18:37:51,709 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:51,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:51,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1644457752, now seen corresponding path program 30 times [2021-07-09 18:37:51,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:51,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261463416] [2021-07-09 18:37:51,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:51,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:52,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:52,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:52,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261463416] [2021-07-09 18:37:52,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261463416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:52,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380802119] [2021-07-09 18:37:52,019 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:52,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:37:52,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:52,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:37:52,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:52,408 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-07-09 18:37:52,612 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-07-09 18:37:52,669 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_191, v_prenex_189], 2=[v_prenex_190, A]} [2021-07-09 18:37:52,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:52,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:37:52,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:52,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:52,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:37:52,681 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:52,813 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-07-09 18:37:52,813 INFO L628 ElimStorePlain]: treesize reduction 118, result has 55.1 percent of original size [2021-07-09 18:37:52,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:52,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:37:52,818 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:52,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:52,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:52,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:52,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:52,869 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:52,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:52,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:52,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:52,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:52,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:52,917 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:52,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:52,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:52,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:37:52,921 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:52,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:52,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:37:52,959 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:293, output treesize:51 [2021-07-09 18:37:53,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:53,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380802119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:53,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:53,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-09 18:37:53,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021436289] [2021-07-09 18:37:53,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:37:53,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:53,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:37:53,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:37:53,016 INFO L87 Difference]: Start difference. First operand 1881 states and 6422 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:53,719 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-07-09 18:37:53,988 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-07-09 18:37:54,204 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-07-09 18:37:54,429 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2021-07-09 18:37:54,649 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-07-09 18:37:54,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:54,765 INFO L93 Difference]: Finished difference Result 2308 states and 7739 transitions. [2021-07-09 18:37:54,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:37:54,765 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:37:54,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:54,769 INFO L225 Difference]: With dead ends: 2308 [2021-07-09 18:37:54,769 INFO L226 Difference]: Without dead ends: 2293 [2021-07-09 18:37:54,769 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 2078.0ms TimeCoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:37:54,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2021-07-09 18:37:54,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 1873. [2021-07-09 18:37:54,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1872 states have (on average 3.419337606837607) internal successors, (6401), 1872 states have internal predecessors, (6401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:54,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 6401 transitions. [2021-07-09 18:37:54,793 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 6401 transitions. Word has length 26 [2021-07-09 18:37:54,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:54,793 INFO L482 AbstractCegarLoop]: Abstraction has 1873 states and 6401 transitions. [2021-07-09 18:37:54,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:54,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 6401 transitions. [2021-07-09 18:37:54,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:37:54,796 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:54,796 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:55,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2612 [2021-07-09 18:37:55,001 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:55,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:55,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1033146674, now seen corresponding path program 31 times [2021-07-09 18:37:55,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:55,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176080771] [2021-07-09 18:37:55,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:55,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:55,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:55,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:55,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176080771] [2021-07-09 18:37:55,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176080771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:55,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084619962] [2021-07-09 18:37:55,306 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:55,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:55,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:37:55,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:55,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:55,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:55,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:55,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:37:55,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:55,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:55,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:55,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:55,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:37:55,642 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:55,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:55,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:55,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:55,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:37:55,647 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:55,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:55,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:55,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:55,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:37:55,652 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:55,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:55,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:55,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:55,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-09 18:37:55,658 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:55,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:55,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:55,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:55,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:55,663 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:55,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:55,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:55,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:55,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:37:55,668 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:55,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:55,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:55,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:55,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:55,674 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:55,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:55,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:55,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:55,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:37:55,679 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:55,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:55,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:55,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:55,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:55,684 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:55,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:55,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:55,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:55,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:55,689 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:55,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:55,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:55,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:55,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:37:55,694 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:55,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:55,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:55,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:55,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:37:55,699 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:55,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:55,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:55,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:55,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:37:55,704 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:55,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:55,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:55,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:37:55,708 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:55,780 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-09 18:37:55,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:37:55,782 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-09 18:37:55,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:55,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084619962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:55,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:55,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:37:55,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413116631] [2021-07-09 18:37:55,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:37:55,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:55,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:37:55,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:37:55,836 INFO L87 Difference]: Start difference. First operand 1873 states and 6401 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:56,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:56,243 INFO L93 Difference]: Finished difference Result 2211 states and 7445 transitions. [2021-07-09 18:37:56,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:37:56,243 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:37:56,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:56,246 INFO L225 Difference]: With dead ends: 2211 [2021-07-09 18:37:56,246 INFO L226 Difference]: Without dead ends: 2196 [2021-07-09 18:37:56,246 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 631.6ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:37:56,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2196 states. [2021-07-09 18:37:56,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2196 to 1867. [2021-07-09 18:37:56,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 3.4190782422293675) internal successors, (6380), 1866 states have internal predecessors, (6380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:56,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 6380 transitions. [2021-07-09 18:37:56,270 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 6380 transitions. Word has length 26 [2021-07-09 18:37:56,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:56,270 INFO L482 AbstractCegarLoop]: Abstraction has 1867 states and 6380 transitions. [2021-07-09 18:37:56,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:56,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 6380 transitions. [2021-07-09 18:37:56,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:37:56,273 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:56,273 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:56,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2625,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:56,489 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:56,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:56,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1034369354, now seen corresponding path program 32 times [2021-07-09 18:37:56,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:56,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952282691] [2021-07-09 18:37:56,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:56,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:56,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:56,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:56,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952282691] [2021-07-09 18:37:56,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952282691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:56,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688961647] [2021-07-09 18:37:56,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:56,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:37:56,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:56,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:37:56,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:57,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:57,087 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:37:57,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:37:57,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:57,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:57,096 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:57,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:57,097 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:57,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:57,107 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:57,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:37:57,110 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:57,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:57,120 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:37:57,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:37:57,121 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:57,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:57,129 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:57,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:37:57,130 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:57,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:57,137 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:57,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:57,138 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:57,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:57,148 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:57,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:37:57,152 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:57,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:57,160 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:57,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-09 18:37:57,160 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:57,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:57,171 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:57,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:37:57,172 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:57,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:57,180 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:57,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:37:57,181 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:57,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:57,191 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:57,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:37:57,193 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:57,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:57,201 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:57,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:37:57,202 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:57,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:57,209 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:57,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:37:57,210 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:57,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:57,220 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:57,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:37:57,221 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:57,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:57,230 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:37:57,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:37:57,231 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:57,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:57,236 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:57,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:37:57,237 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:57,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:57,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:37:57,320 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:689, output treesize:174 [2021-07-09 18:37:57,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:57,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688961647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:57,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:57,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 18:37:57,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588766445] [2021-07-09 18:37:57,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:37:57,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:57,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:37:57,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:37:57,494 INFO L87 Difference]: Start difference. First operand 1867 states and 6380 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:58,012 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 44 [2021-07-09 18:37:58,552 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 56 [2021-07-09 18:37:58,919 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2021-07-09 18:37:59,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:59,066 INFO L93 Difference]: Finished difference Result 2784 states and 9269 transitions. [2021-07-09 18:37:59,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:37:59,067 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:37:59,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:59,071 INFO L225 Difference]: With dead ends: 2784 [2021-07-09 18:37:59,072 INFO L226 Difference]: Without dead ends: 2769 [2021-07-09 18:37:59,072 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1772.0ms TimeCoverageRelationStatistics Valid=245, Invalid=877, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:37:59,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2769 states. [2021-07-09 18:37:59,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2769 to 1864. [2021-07-09 18:37:59,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1864 states, 1863 states have (on average 3.416532474503489) internal successors, (6365), 1863 states have internal predecessors, (6365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:59,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 6365 transitions. [2021-07-09 18:37:59,102 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 6365 transitions. Word has length 26 [2021-07-09 18:37:59,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:59,102 INFO L482 AbstractCegarLoop]: Abstraction has 1864 states and 6365 transitions. [2021-07-09 18:37:59,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:59,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 6365 transitions. [2021-07-09 18:37:59,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:37:59,105 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:59,105 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:37:59,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2653 [2021-07-09 18:37:59,305 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:59,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:59,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1269968860, now seen corresponding path program 33 times [2021-07-09 18:37:59,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:59,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121318078] [2021-07-09 18:37:59,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:59,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:59,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:59,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:59,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121318078] [2021-07-09 18:37:59,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121318078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:59,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278496987] [2021-07-09 18:37:59,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:59,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:37:59,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:59,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:37:59,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:59,953 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-07-09 18:38:00,177 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-07-09 18:38:00,254 INFO L446 ElimStorePlain]: Different costs {1=[A, v_prenex_201], 2=[v_prenex_199, v_prenex_200]} [2021-07-09 18:38:00,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:00,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:38:00,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:00,372 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-07-09 18:38:00,372 INFO L628 ElimStorePlain]: treesize reduction 54, result has 73.9 percent of original size [2021-07-09 18:38:00,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:00,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:38:00,377 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:00,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:00,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:00,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:00,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:00,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:38:00,429 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:00,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:00,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:00,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:38:00,434 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:00,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:00,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:00,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:00,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:38:00,485 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:00,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:00,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:38:00,527 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:217, output treesize:51 [2021-07-09 18:38:00,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:00,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278496987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:00,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:00,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 18:38:00,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405284660] [2021-07-09 18:38:00,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:38:00,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:00,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:38:00,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:38:00,581 INFO L87 Difference]: Start difference. First operand 1864 states and 6365 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:01,762 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-07-09 18:38:02,162 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-07-09 18:38:02,460 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 63 [2021-07-09 18:38:02,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:02,619 INFO L93 Difference]: Finished difference Result 2480 states and 8310 transitions. [2021-07-09 18:38:02,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:38:02,619 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:02,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:02,623 INFO L225 Difference]: With dead ends: 2480 [2021-07-09 18:38:02,623 INFO L226 Difference]: Without dead ends: 2465 [2021-07-09 18:38:02,624 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 2367.8ms TimeCoverageRelationStatistics Valid=232, Invalid=958, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:38:02,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2021-07-09 18:38:02,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 1863. [2021-07-09 18:38:02,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1862 states have (on average 3.4162191192266382) internal successors, (6361), 1862 states have internal predecessors, (6361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:02,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 6361 transitions. [2021-07-09 18:38:02,650 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 6361 transitions. Word has length 26 [2021-07-09 18:38:02,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:02,650 INFO L482 AbstractCegarLoop]: Abstraction has 1863 states and 6361 transitions. [2021-07-09 18:38:02,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:02,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 6361 transitions. [2021-07-09 18:38:02,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:02,653 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:02,653 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:02,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2690,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:02,853 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:02,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:02,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1946185846, now seen corresponding path program 34 times [2021-07-09 18:38:02,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:02,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956771506] [2021-07-09 18:38:02,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:02,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:03,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:03,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:03,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956771506] [2021-07-09 18:38:03,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956771506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:03,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111545794] [2021-07-09 18:38:03,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:03,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:38:03,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:03,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:38:03,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:03,410 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-07-09 18:38:03,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:03,517 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:38:03,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:38:03,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:03,627 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-07-09 18:38:03,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:03,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:03,639 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:38:03,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:38:03,640 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:03,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:03,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:03,751 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:03,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:38:03,753 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:03,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:03,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:03,861 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:03,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:38:03,864 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:03,970 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-07-09 18:38:03,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:03,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:03,981 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:03,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:38:03,984 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:04,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:04,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:04,084 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:04,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:38:04,085 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:04,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:04,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:04,185 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:04,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:38:04,186 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:04,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:04,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:04,284 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:38:04,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:38:04,285 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:04,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:04,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:38:04,375 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-07-09 18:38:04,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:04,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111545794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:04,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:04,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 18:38:04,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605285892] [2021-07-09 18:38:04,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:38:04,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:04,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:38:04,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:38:04,545 INFO L87 Difference]: Start difference. First operand 1863 states and 6361 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:05,074 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 42 [2021-07-09 18:38:05,493 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-07-09 18:38:05,957 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-07-09 18:38:06,343 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 61 [2021-07-09 18:38:06,527 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-07-09 18:38:06,777 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2021-07-09 18:38:06,917 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-07-09 18:38:06,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:06,989 INFO L93 Difference]: Finished difference Result 2968 states and 9767 transitions. [2021-07-09 18:38:06,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:38:06,989 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:06,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:06,994 INFO L225 Difference]: With dead ends: 2968 [2021-07-09 18:38:06,994 INFO L226 Difference]: Without dead ends: 2938 [2021-07-09 18:38:06,995 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 2711.8ms TimeCoverageRelationStatistics Valid=276, Invalid=984, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:38:06,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2021-07-09 18:38:07,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 1863. [2021-07-09 18:38:07,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1862 states have (on average 3.4183673469387754) internal successors, (6365), 1862 states have internal predecessors, (6365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:07,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 6365 transitions. [2021-07-09 18:38:07,035 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 6365 transitions. Word has length 26 [2021-07-09 18:38:07,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:07,035 INFO L482 AbstractCegarLoop]: Abstraction has 1863 states and 6365 transitions. [2021-07-09 18:38:07,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:07,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 6365 transitions. [2021-07-09 18:38:07,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:07,037 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:07,037 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:07,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2699,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:07,238 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:07,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:07,238 INFO L82 PathProgramCache]: Analyzing trace with hash 663462910, now seen corresponding path program 35 times [2021-07-09 18:38:07,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:07,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538059021] [2021-07-09 18:38:07,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:07,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:07,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:07,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:07,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538059021] [2021-07-09 18:38:07,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538059021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:07,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014007596] [2021-07-09 18:38:07,580 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:07,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:38:07,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:07,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:38:07,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:07,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:07,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:07,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:07,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:38:07,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:07,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:07,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:07,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:07,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:38:07,984 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:07,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:07,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:07,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:07,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:38:07,990 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:07,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:07,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:07,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:07,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:38:07,996 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:07,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:07,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:08,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:08,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:38:08,001 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:08,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:08,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:08,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:08,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:38:08,007 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:08,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:08,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:08,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:08,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:38:08,013 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:08,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:08,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:08,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:08,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:38:08,019 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:08,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:08,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:08,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:08,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:38:08,025 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:08,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:08,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:08,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:08,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:38:08,031 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:08,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:08,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:08,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:08,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:38:08,037 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:08,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:08,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:08,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:08,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-09 18:38:08,043 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:08,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:08,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:08,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:08,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:38:08,049 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:08,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:08,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:08,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:08,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:38:08,054 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:08,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:08,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:08,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:38:08,058 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:08,131 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-09 18:38:08,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:38:08,133 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-09 18:38:08,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:08,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014007596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:08,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:08,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:38:08,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485427107] [2021-07-09 18:38:08,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:38:08,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:08,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:38:08,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:38:08,183 INFO L87 Difference]: Start difference. First operand 1863 states and 6365 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:08,982 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-07-09 18:38:09,133 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-07-09 18:38:09,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:09,312 INFO L93 Difference]: Finished difference Result 2374 states and 7932 transitions. [2021-07-09 18:38:09,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:38:09,312 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:09,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:09,316 INFO L225 Difference]: With dead ends: 2374 [2021-07-09 18:38:09,316 INFO L226 Difference]: Without dead ends: 2353 [2021-07-09 18:38:09,316 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1376.2ms TimeCoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:38:09,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2353 states. [2021-07-09 18:38:09,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2353 to 1878. [2021-07-09 18:38:09,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1878 states, 1877 states have (on average 3.4214171550346295) internal successors, (6422), 1877 states have internal predecessors, (6422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:09,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 6422 transitions. [2021-07-09 18:38:09,340 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 6422 transitions. Word has length 26 [2021-07-09 18:38:09,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:09,340 INFO L482 AbstractCegarLoop]: Abstraction has 1878 states and 6422 transitions. [2021-07-09 18:38:09,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:09,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 6422 transitions. [2021-07-09 18:38:09,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:09,342 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:09,342 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:09,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2714,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:09,543 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:09,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:09,543 INFO L82 PathProgramCache]: Analyzing trace with hash -716780640, now seen corresponding path program 36 times [2021-07-09 18:38:09,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:09,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158919193] [2021-07-09 18:38:09,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:09,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:09,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:09,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:09,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158919193] [2021-07-09 18:38:09,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158919193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:09,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719747499] [2021-07-09 18:38:09,768 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:09,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:38:09,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:09,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:38:09,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:10,112 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:38:10,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:38:10,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:10,122 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:38:10,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:38:10,123 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:10,142 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:38:10,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-07-09 18:38:10,146 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:10,164 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:38:10,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:38:10,165 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:10,180 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:10,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:38:10,183 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:10,192 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:38:10,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-07-09 18:38:10,193 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:10,202 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:38:10,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:38:10,203 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:10,222 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:38:10,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:38:10,225 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:10,234 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:38:10,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:38:10,235 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:10,244 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:38:10,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:38:10,245 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:10,253 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:38:10,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:38:10,254 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:10,262 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:38:10,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:38:10,263 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:10,271 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:38:10,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:38:10,272 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:10,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:10,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-09 18:38:10,291 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:10,305 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:10,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:38:10,307 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:10,319 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:38:10,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:38:10,321 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:10,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:10,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:38:10,424 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:689, output treesize:255 [2021-07-09 18:38:10,584 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-07-09 18:38:10,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:10,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719747499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:10,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:10,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-09 18:38:10,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638599035] [2021-07-09 18:38:10,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:38:10,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:10,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:38:10,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:38:10,677 INFO L87 Difference]: Start difference. First operand 1878 states and 6422 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:12,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:12,496 INFO L93 Difference]: Finished difference Result 2454 states and 8038 transitions. [2021-07-09 18:38:12,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:38:12,497 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:12,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:12,500 INFO L225 Difference]: With dead ends: 2454 [2021-07-09 18:38:12,500 INFO L226 Difference]: Without dead ends: 2416 [2021-07-09 18:38:12,501 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 1795.9ms TimeCoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:38:12,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2021-07-09 18:38:12,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 1866. [2021-07-09 18:38:12,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1866 states, 1865 states have (on average 3.420911528150134) internal successors, (6380), 1865 states have internal predecessors, (6380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:12,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 6380 transitions. [2021-07-09 18:38:12,532 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 6380 transitions. Word has length 26 [2021-07-09 18:38:12,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:12,532 INFO L482 AbstractCegarLoop]: Abstraction has 1866 states and 6380 transitions. [2021-07-09 18:38:12,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:12,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 6380 transitions. [2021-07-09 18:38:12,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:12,535 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:12,535 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:12,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2742 [2021-07-09 18:38:12,750 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:12,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:12,751 INFO L82 PathProgramCache]: Analyzing trace with hash 475685792, now seen corresponding path program 37 times [2021-07-09 18:38:12,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:12,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999754145] [2021-07-09 18:38:12,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:12,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:12,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:12,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:12,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999754145] [2021-07-09 18:38:12,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999754145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:12,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413372632] [2021-07-09 18:38:12,994 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:13,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:13,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:38:13,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:13,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:13,253 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:13,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:38:13,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:13,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:13,264 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:13,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:38:13,265 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:13,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:13,275 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:13,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:38:13,279 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:13,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:13,289 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:13,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:38:13,291 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:13,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:13,302 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:38:13,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:38:13,304 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:13,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:13,315 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:38:13,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:38:13,316 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:13,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:13,325 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:13,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:38:13,326 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:13,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:13,334 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:13,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:38:13,335 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:13,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:13,345 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:38:13,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:38:13,347 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:13,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:13,355 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:13,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:38:13,355 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:13,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:13,365 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:13,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:38:13,367 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:13,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:13,375 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:13,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-09 18:38:13,376 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:13,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:13,384 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:13,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:38:13,384 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:13,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:13,392 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:13,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:38:13,393 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:13,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:13,402 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:13,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:38:13,405 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:13,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:13,411 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:13,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:38:13,411 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:13,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:13,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:38:13,507 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:705, output treesize:180 [2021-07-09 18:38:13,654 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-07-09 18:38:13,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:13,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413372632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:13,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:13,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:38:13,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864935302] [2021-07-09 18:38:13,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:38:13,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:13,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:38:13,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:38:13,756 INFO L87 Difference]: Start difference. First operand 1866 states and 6380 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:14,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:14,217 INFO L93 Difference]: Finished difference Result 2282 states and 7604 transitions. [2021-07-09 18:38:14,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:38:14,217 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:14,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:14,221 INFO L225 Difference]: With dead ends: 2282 [2021-07-09 18:38:14,221 INFO L226 Difference]: Without dead ends: 2257 [2021-07-09 18:38:14,221 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 791.3ms TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:38:14,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2021-07-09 18:38:14,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 1857. [2021-07-09 18:38:14,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 3.4132543103448274) internal successors, (6335), 1856 states have internal predecessors, (6335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:14,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 6335 transitions. [2021-07-09 18:38:14,246 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 6335 transitions. Word has length 26 [2021-07-09 18:38:14,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:14,247 INFO L482 AbstractCegarLoop]: Abstraction has 1857 states and 6335 transitions. [2021-07-09 18:38:14,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:14,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 6335 transitions. [2021-07-09 18:38:14,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:14,249 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:14,249 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:14,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2793 [2021-07-09 18:38:14,450 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:14,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:14,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1353247494, now seen corresponding path program 38 times [2021-07-09 18:38:14,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:14,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832539262] [2021-07-09 18:38:14,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:14,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:14,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:14,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:14,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832539262] [2021-07-09 18:38:14,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832539262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:14,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978833921] [2021-07-09 18:38:14,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:14,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:38:14,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:14,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:38:14,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:15,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:15,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:15,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:15,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:38:15,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:15,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:15,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:15,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:15,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:38:15,060 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:15,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:15,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:15,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:15,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-09 18:38:15,065 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:15,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:15,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:15,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:15,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:38:15,070 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:15,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:15,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:15,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:15,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:38:15,075 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:15,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:15,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:15,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:15,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:38:15,081 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:15,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:15,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:15,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:15,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:38:15,086 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:15,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:15,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:15,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:15,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:38:15,092 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:15,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:15,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:15,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:15,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:38:15,098 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:15,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:15,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:15,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:15,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:38:15,103 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:15,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:15,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:15,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:15,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:38:15,108 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:15,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:15,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:15,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:15,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:38:15,113 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:15,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:15,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:15,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:15,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:38:15,118 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:15,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:15,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:15,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:15,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:38:15,123 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:15,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:15,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:15,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:38:15,127 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:15,198 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-09 18:38:15,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:38:15,199 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-09 18:38:15,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:15,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978833921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:15,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:15,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:38:15,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698548226] [2021-07-09 18:38:15,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:38:15,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:15,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:38:15,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:38:15,254 INFO L87 Difference]: Start difference. First operand 1857 states and 6335 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:15,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:15,501 INFO L93 Difference]: Finished difference Result 1943 states and 6537 transitions. [2021-07-09 18:38:15,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:38:15,501 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:15,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:15,504 INFO L225 Difference]: With dead ends: 1943 [2021-07-09 18:38:15,504 INFO L226 Difference]: Without dead ends: 1924 [2021-07-09 18:38:15,505 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 491.2ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:38:15,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2021-07-09 18:38:15,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 1834. [2021-07-09 18:38:15,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1834 states, 1833 states have (on average 3.413529732678669) internal successors, (6257), 1833 states have internal predecessors, (6257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:15,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1834 states to 1834 states and 6257 transitions. [2021-07-09 18:38:15,527 INFO L78 Accepts]: Start accepts. Automaton has 1834 states and 6257 transitions. Word has length 26 [2021-07-09 18:38:15,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:15,527 INFO L482 AbstractCegarLoop]: Abstraction has 1834 states and 6257 transitions. [2021-07-09 18:38:15,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:15,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1834 states and 6257 transitions. [2021-07-09 18:38:15,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:15,530 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:15,530 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:15,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2834,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:15,730 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:15,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:15,731 INFO L82 PathProgramCache]: Analyzing trace with hash 794427266, now seen corresponding path program 39 times [2021-07-09 18:38:15,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:15,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126833858] [2021-07-09 18:38:15,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:15,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:15,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:15,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:15,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126833858] [2021-07-09 18:38:15,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126833858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:15,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687583078] [2021-07-09 18:38:15,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:15,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:38:15,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:15,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:38:15,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:16,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:16,387 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:38:16,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:38:16,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:16,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:16,412 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:38:16,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:38:16,414 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:16,555 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-07-09 18:38:16,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:16,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:16,572 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:16,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-07-09 18:38:16,578 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:16,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:16,595 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:38:16,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:38:16,596 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:16,852 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2021-07-09 18:38:16,852 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.0 percent of original size [2021-07-09 18:38:16,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:16,869 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:16,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:38:16,872 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:16,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:16,890 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:38:16,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-07-09 18:38:16,891 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:17,128 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-07-09 18:38:17,129 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.1 percent of original size [2021-07-09 18:38:17,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:17,146 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:38:17,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:38:17,148 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:17,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:17,160 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:17,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-09 18:38:17,166 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:17,277 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-07-09 18:38:17,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:17,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:38:17,294 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:253 [2021-07-09 18:38:17,488 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-07-09 18:38:17,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:17,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687583078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:17,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:17,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-09 18:38:17,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604046271] [2021-07-09 18:38:17,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:38:17,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:17,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:38:17,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:38:17,579 INFO L87 Difference]: Start difference. First operand 1834 states and 6257 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:18,218 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-07-09 18:38:18,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:18,428 INFO L93 Difference]: Finished difference Result 2041 states and 6856 transitions. [2021-07-09 18:38:18,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:38:18,429 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:18,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:18,432 INFO L225 Difference]: With dead ends: 2041 [2021-07-09 18:38:18,432 INFO L226 Difference]: Without dead ends: 2016 [2021-07-09 18:38:18,433 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1172.0ms TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:38:18,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2016 states. [2021-07-09 18:38:18,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2016 to 1816. [2021-07-09 18:38:18,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 3.41763085399449) internal successors, (6203), 1815 states have internal predecessors, (6203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:18,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 6203 transitions. [2021-07-09 18:38:18,455 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 6203 transitions. Word has length 26 [2021-07-09 18:38:18,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:18,456 INFO L482 AbstractCegarLoop]: Abstraction has 1816 states and 6203 transitions. [2021-07-09 18:38:18,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:18,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 6203 transitions. [2021-07-09 18:38:18,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:18,458 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:18,458 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:18,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2862 [2021-07-09 18:38:18,659 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:18,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:18,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1247883966, now seen corresponding path program 40 times [2021-07-09 18:38:18,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:18,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617879600] [2021-07-09 18:38:18,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:18,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:18,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:18,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:18,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617879600] [2021-07-09 18:38:18,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617879600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:18,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125524372] [2021-07-09 18:38:18,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:18,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:38:18,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:18,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:38:18,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:19,263 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-07-09 18:38:19,353 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_232], 3=[v_prenex_233, v_prenex_234]} [2021-07-09 18:38:19,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:19,367 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:19,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:38:19,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:19,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:19,379 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:19,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:38:19,381 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:19,510 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-07-09 18:38:19,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:19,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:19,523 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:19,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:38:19,524 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:19,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:19,534 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:38:19,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:38:19,536 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:19,655 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-07-09 18:38:19,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:19,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:19,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:19,669 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-09 18:38:19,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2021-07-09 18:38:19,670 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:19,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:19,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:19,680 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:19,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-07-09 18:38:19,683 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:19,789 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-07-09 18:38:19,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:19,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:19,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:19,800 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:19,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-07-09 18:38:19,803 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:19,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:19,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:19,813 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-09 18:38:19,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 18:38:19,814 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:19,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:19,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:38:19,913 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:361, output treesize:194 [2021-07-09 18:38:20,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:20,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125524372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:20,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:20,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 18:38:20,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451940940] [2021-07-09 18:38:20,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:38:20,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:20,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:38:20,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:38:20,112 INFO L87 Difference]: Start difference. First operand 1816 states and 6203 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:20,345 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-07-09 18:38:20,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:20,775 INFO L93 Difference]: Finished difference Result 2323 states and 7788 transitions. [2021-07-09 18:38:20,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:38:20,775 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:20,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:20,779 INFO L225 Difference]: With dead ends: 2323 [2021-07-09 18:38:20,779 INFO L226 Difference]: Without dead ends: 2298 [2021-07-09 18:38:20,779 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1093.1ms TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:38:20,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-07-09 18:38:20,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 1804. [2021-07-09 18:38:20,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 3.4170826400443706) internal successors, (6161), 1803 states have internal predecessors, (6161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:20,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 6161 transitions. [2021-07-09 18:38:20,805 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 6161 transitions. Word has length 26 [2021-07-09 18:38:20,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:20,805 INFO L482 AbstractCegarLoop]: Abstraction has 1804 states and 6161 transitions. [2021-07-09 18:38:20,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:20,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 6161 transitions. [2021-07-09 18:38:20,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:20,807 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:20,807 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:21,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2919 [2021-07-09 18:38:21,008 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:21,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:21,008 INFO L82 PathProgramCache]: Analyzing trace with hash 305289786, now seen corresponding path program 41 times [2021-07-09 18:38:21,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:21,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909187059] [2021-07-09 18:38:21,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:21,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:21,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:21,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:21,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909187059] [2021-07-09 18:38:21,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909187059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:21,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525357499] [2021-07-09 18:38:21,269 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:21,293 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:38:21,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:21,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:38:21,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:21,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:21,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:21,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:21,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:38:21,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:21,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:21,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:21,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:21,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:38:21,657 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:21,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:21,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:21,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:21,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:38:21,662 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:21,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:21,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:21,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:21,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:38:21,668 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:21,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:21,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:21,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:21,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:38:21,673 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:21,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:21,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:21,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:21,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:38:21,679 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:21,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:21,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:21,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:21,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:38:21,685 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:21,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:21,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:21,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:21,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:38:21,690 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:21,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:21,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:21,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:21,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:38:21,695 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:21,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:21,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:21,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:21,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:38:21,701 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:21,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:21,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:21,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:21,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-09 18:38:21,706 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:21,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:21,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:21,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:21,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:38:21,712 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:21,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:21,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:21,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:21,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:38:21,717 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:21,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:21,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:21,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:21,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:38:21,722 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:21,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:21,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:21,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:38:21,725 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:21,795 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-07-09 18:38:21,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:38:21,796 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-07-09 18:38:21,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:21,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525357499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:21,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:21,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:38:21,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804996387] [2021-07-09 18:38:21,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:38:21,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:21,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:38:21,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:38:21,846 INFO L87 Difference]: Start difference. First operand 1804 states and 6161 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:22,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:22,701 INFO L93 Difference]: Finished difference Result 2327 states and 7784 transitions. [2021-07-09 18:38:22,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:38:22,702 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:22,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:22,706 INFO L225 Difference]: With dead ends: 2327 [2021-07-09 18:38:22,706 INFO L226 Difference]: Without dead ends: 2312 [2021-07-09 18:38:22,706 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1003.7ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:38:22,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2312 states. [2021-07-09 18:38:22,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2312 to 1849. [2021-07-09 18:38:22,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1848 states have (on average 3.411796536796537) internal successors, (6305), 1848 states have internal predecessors, (6305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:22,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 6305 transitions. [2021-07-09 18:38:22,732 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 6305 transitions. Word has length 26 [2021-07-09 18:38:22,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:22,732 INFO L482 AbstractCegarLoop]: Abstraction has 1849 states and 6305 transitions. [2021-07-09 18:38:22,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:22,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 6305 transitions. [2021-07-09 18:38:22,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:22,734 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:22,735 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:22,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2951 [2021-07-09 18:38:22,935 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:22,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:22,935 INFO L82 PathProgramCache]: Analyzing trace with hash 137480694, now seen corresponding path program 42 times [2021-07-09 18:38:22,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:22,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668947916] [2021-07-09 18:38:22,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:22,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:23,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:23,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:23,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668947916] [2021-07-09 18:38:23,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668947916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:23,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909560885] [2021-07-09 18:38:23,230 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:23,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:38:23,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:23,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:38:23,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:23,574 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:38:23,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-07-09 18:38:23,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:23,583 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:38:23,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:38:23,584 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:23,592 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:38:23,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:38:23,592 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:23,600 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:38:23,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:38:23,601 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:23,608 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:38:23,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:38:23,609 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:23,623 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:23,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:38:23,625 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:23,633 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:38:23,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:38:23,634 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:23,642 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:38:23,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:38:23,643 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:23,651 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:38:23,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:38:23,652 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:23,666 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:23,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:38:23,668 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:23,684 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:38:23,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:38:23,686 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:23,700 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:23,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-09 18:38:23,704 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:23,722 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:38:23,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:38:23,723 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:23,741 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:38:23,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:38:23,745 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:23,763 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:38:23,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-07-09 18:38:23,767 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:23,779 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:38:23,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:38:23,781 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:23,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:23,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:38:23,884 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:689, output treesize:247 [2021-07-09 18:38:24,057 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-07-09 18:38:24,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:24,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909560885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:24,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:24,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:38:24,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375674930] [2021-07-09 18:38:24,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:38:24,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:24,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:38:24,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:38:24,161 INFO L87 Difference]: Start difference. First operand 1849 states and 6305 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:25,138 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2021-07-09 18:38:25,291 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2021-07-09 18:38:25,690 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2021-07-09 18:38:25,856 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2021-07-09 18:38:26,082 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 43 [2021-07-09 18:38:26,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:26,114 INFO L93 Difference]: Finished difference Result 2674 states and 8821 transitions. [2021-07-09 18:38:26,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:38:26,115 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:26,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:26,119 INFO L225 Difference]: With dead ends: 2674 [2021-07-09 18:38:26,119 INFO L226 Difference]: Without dead ends: 2644 [2021-07-09 18:38:26,119 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 2226.4ms TimeCoverageRelationStatistics Valid=284, Invalid=1198, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:38:26,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2021-07-09 18:38:26,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 1849. [2021-07-09 18:38:26,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1848 states have (on average 3.411796536796537) internal successors, (6305), 1848 states have internal predecessors, (6305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:26,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 6305 transitions. [2021-07-09 18:38:26,145 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 6305 transitions. Word has length 26 [2021-07-09 18:38:26,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:26,145 INFO L482 AbstractCegarLoop]: Abstraction has 1849 states and 6305 transitions. [2021-07-09 18:38:26,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:26,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 6305 transitions. [2021-07-09 18:38:26,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:26,148 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:26,148 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:26,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2983 [2021-07-09 18:38:26,350 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:26,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:26,350 INFO L82 PathProgramCache]: Analyzing trace with hash 436254142, now seen corresponding path program 43 times [2021-07-09 18:38:26,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:26,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45545315] [2021-07-09 18:38:26,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:26,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:26,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:26,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:26,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45545315] [2021-07-09 18:38:26,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45545315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:26,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919293390] [2021-07-09 18:38:26,684 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:26,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:26,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:38:26,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:27,026 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_238], 3=[A, v_prenex_240, v_prenex_236]} [2021-07-09 18:38:27,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:27,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:27,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:27,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:38:27,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:27,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:27,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:27,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:38:27,045 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:27,182 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-07-09 18:38:27,182 INFO L628 ElimStorePlain]: treesize reduction 158, result has 46.4 percent of original size [2021-07-09 18:38:27,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:27,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:27,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-09 18:38:27,188 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:27,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:27,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:27,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:38:27,238 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:27,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:27,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:27,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:38:27,284 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:27,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:27,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:38:27,324 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:335, output treesize:51 [2021-07-09 18:38:27,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:27,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919293390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:27,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:27,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:38:27,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523473527] [2021-07-09 18:38:27,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:38:27,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:27,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:38:27,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:38:27,382 INFO L87 Difference]: Start difference. First operand 1849 states and 6305 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:28,048 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-07-09 18:38:28,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:28,157 INFO L93 Difference]: Finished difference Result 2432 states and 8093 transitions. [2021-07-09 18:38:28,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:38:28,157 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:28,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:28,161 INFO L225 Difference]: With dead ends: 2432 [2021-07-09 18:38:28,161 INFO L226 Difference]: Without dead ends: 2402 [2021-07-09 18:38:28,162 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1112.1ms TimeCoverageRelationStatistics Valid=193, Invalid=677, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:38:28,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2402 states. [2021-07-09 18:38:28,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2402 to 1851. [2021-07-09 18:38:28,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1851 states, 1850 states have (on average 3.4135135135135135) internal successors, (6315), 1850 states have internal predecessors, (6315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:28,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1851 states to 1851 states and 6315 transitions. [2021-07-09 18:38:28,188 INFO L78 Accepts]: Start accepts. Automaton has 1851 states and 6315 transitions. Word has length 26 [2021-07-09 18:38:28,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:28,188 INFO L482 AbstractCegarLoop]: Abstraction has 1851 states and 6315 transitions. [2021-07-09 18:38:28,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:28,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1851 states and 6315 transitions. [2021-07-09 18:38:28,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:28,190 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:28,190 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:28,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3032 [2021-07-09 18:38:28,401 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:28,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:28,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1514157122, now seen corresponding path program 44 times [2021-07-09 18:38:28,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:28,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544336677] [2021-07-09 18:38:28,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:28,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:28,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:28,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:28,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544336677] [2021-07-09 18:38:28,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544336677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:28,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424291080] [2021-07-09 18:38:28,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:28,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:38:28,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:28,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:38:28,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:29,006 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-07-09 18:38:29,156 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-07-09 18:38:29,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:29,370 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:38:29,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:38:29,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:29,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:29,392 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:38:29,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:38:29,396 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:29,555 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-07-09 18:38:29,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:29,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:29,578 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:38:29,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 33 [2021-07-09 18:38:29,579 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:29,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:29,594 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:29,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 37 [2021-07-09 18:38:29,597 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:29,908 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 80 [2021-07-09 18:38:29,909 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.7 percent of original size [2021-07-09 18:38:29,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:29,928 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:38:29,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:38:29,930 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:29,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:29,943 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:29,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-09 18:38:29,948 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:30,085 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-07-09 18:38:30,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:30,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:30,102 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:30,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-07-09 18:38:30,108 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:30,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:30,124 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:38:30,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:38:30,126 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:30,381 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-07-09 18:38:30,381 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.9 percent of original size [2021-07-09 18:38:30,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:38:30,398 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:385, output treesize:286 [2021-07-09 18:38:30,605 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-07-09 18:38:30,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:30,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424291080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:30,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:30,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 18:38:30,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638314285] [2021-07-09 18:38:30,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:38:30,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:30,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:38:30,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:38:30,703 INFO L87 Difference]: Start difference. First operand 1851 states and 6315 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:31,019 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-07-09 18:38:31,303 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2021-07-09 18:38:31,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:31,829 INFO L93 Difference]: Finished difference Result 2442 states and 8174 transitions. [2021-07-09 18:38:31,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:38:31,830 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:31,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:31,833 INFO L225 Difference]: With dead ends: 2442 [2021-07-09 18:38:31,833 INFO L226 Difference]: Without dead ends: 2427 [2021-07-09 18:38:31,834 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1654.7ms TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:38:31,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2021-07-09 18:38:31,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 1869. [2021-07-09 18:38:31,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 3.4095289079229123) internal successors, (6369), 1868 states have internal predecessors, (6369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:31,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 6369 transitions. [2021-07-09 18:38:31,861 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 6369 transitions. Word has length 26 [2021-07-09 18:38:31,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:31,861 INFO L482 AbstractCegarLoop]: Abstraction has 1869 states and 6369 transitions. [2021-07-09 18:38:31,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:31,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 6369 transitions. [2021-07-09 18:38:31,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:31,863 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:31,863 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:32,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3043,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:32,079 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:32,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:32,079 INFO L82 PathProgramCache]: Analyzing trace with hash -714815838, now seen corresponding path program 45 times [2021-07-09 18:38:32,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:32,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114007098] [2021-07-09 18:38:32,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:32,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:32,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:32,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:32,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114007098] [2021-07-09 18:38:32,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114007098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:32,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967203911] [2021-07-09 18:38:32,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:32,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:38:32,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:32,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:38:32,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:32,811 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-07-09 18:38:33,056 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-07-09 18:38:33,143 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_256, v_prenex_257], 2=[A, v_prenex_258]} [2021-07-09 18:38:33,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:33,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:38:33,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:33,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:33,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:38:33,163 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:33,304 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-07-09 18:38:33,304 INFO L628 ElimStorePlain]: treesize reduction 130, result has 54.7 percent of original size [2021-07-09 18:38:33,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:33,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:38:33,310 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:33,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:33,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:33,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:33,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:33,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:38:33,368 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:33,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:33,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:33,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:38:33,373 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:33,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:33,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:33,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:33,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:38:33,422 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:33,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:33,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:38:33,473 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:317, output treesize:51 [2021-07-09 18:38:33,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:33,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967203911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:33,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:33,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 18:38:33,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447242242] [2021-07-09 18:38:33,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:38:33,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:33,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:38:33,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:38:33,531 INFO L87 Difference]: Start difference. First operand 1869 states and 6369 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:34,169 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-07-09 18:38:34,428 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 80 [2021-07-09 18:38:34,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:34,535 INFO L93 Difference]: Finished difference Result 1982 states and 6684 transitions. [2021-07-09 18:38:34,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:38:34,535 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:34,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:34,539 INFO L225 Difference]: With dead ends: 1982 [2021-07-09 18:38:34,539 INFO L226 Difference]: Without dead ends: 1967 [2021-07-09 18:38:34,539 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1535.2ms TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:38:34,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2021-07-09 18:38:34,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1890. [2021-07-09 18:38:34,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1889 states have (on average 3.4060349391212283) internal successors, (6434), 1889 states have internal predecessors, (6434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:34,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 6434 transitions. [2021-07-09 18:38:34,565 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 6434 transitions. Word has length 26 [2021-07-09 18:38:34,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:34,565 INFO L482 AbstractCegarLoop]: Abstraction has 1890 states and 6434 transitions. [2021-07-09 18:38:34,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:34,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 6434 transitions. [2021-07-09 18:38:34,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:34,567 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:34,567 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:34,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3104 [2021-07-09 18:38:34,768 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:34,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:34,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1962618678, now seen corresponding path program 46 times [2021-07-09 18:38:34,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:34,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434597590] [2021-07-09 18:38:34,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:34,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:34,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:34,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:34,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434597590] [2021-07-09 18:38:34,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434597590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:34,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742325173] [2021-07-09 18:38:34,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:35,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:38:35,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:35,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:38:35,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:35,413 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-07-09 18:38:35,461 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_270, v_prenex_264, v_prenex_266], 3=[v_prenex_271, v_prenex_273, v_prenex_265, v_prenex_268]} [2021-07-09 18:38:35,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:35,474 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:35,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:38:35,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:35,588 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-07-09 18:38:35,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:35,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:35,601 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:35,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:38:35,602 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:35,717 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-07-09 18:38:35,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:35,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:35,730 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:38:35,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:38:35,732 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:35,842 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-07-09 18:38:35,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:35,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:35,854 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:35,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:38:35,855 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:35,973 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-07-09 18:38:35,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:35,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:35,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:35,984 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:35,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-07-09 18:38:35,987 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:36,089 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-07-09 18:38:36,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:36,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:36,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:36,100 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:36,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-07-09 18:38:36,103 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:36,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:36,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:36,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:36,211 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-09 18:38:36,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 18:38:36,212 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:36,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:36,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:36,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:36,314 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-09 18:38:36,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2021-07-09 18:38:36,315 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:36,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:36,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:38:36,409 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:345, output treesize:194 [2021-07-09 18:38:36,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:36,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742325173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:36,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:36,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:38:36,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933294425] [2021-07-09 18:38:36,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:38:36,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:36,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:38:36,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:38:36,592 INFO L87 Difference]: Start difference. First operand 1890 states and 6434 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:37,328 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-07-09 18:38:37,705 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2021-07-09 18:38:37,914 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2021-07-09 18:38:38,139 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 43 [2021-07-09 18:38:38,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:38,257 INFO L93 Difference]: Finished difference Result 2744 states and 9064 transitions. [2021-07-09 18:38:38,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:38:38,258 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:38,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:38,262 INFO L225 Difference]: With dead ends: 2744 [2021-07-09 18:38:38,262 INFO L226 Difference]: Without dead ends: 2714 [2021-07-09 18:38:38,262 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 1894.2ms TimeCoverageRelationStatistics Valid=217, Invalid=775, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:38:38,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2714 states. [2021-07-09 18:38:38,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2714 to 1888. [2021-07-09 18:38:38,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1887 states have (on average 3.408055113937467) internal successors, (6431), 1887 states have internal predecessors, (6431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:38,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 6431 transitions. [2021-07-09 18:38:38,289 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 6431 transitions. Word has length 26 [2021-07-09 18:38:38,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:38,289 INFO L482 AbstractCegarLoop]: Abstraction has 1888 states and 6431 transitions. [2021-07-09 18:38:38,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:38,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 6431 transitions. [2021-07-09 18:38:38,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:38,292 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:38,292 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:38,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3119,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:38,492 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:38,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:38,492 INFO L82 PathProgramCache]: Analyzing trace with hash 272675774, now seen corresponding path program 47 times [2021-07-09 18:38:38,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:38,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87716425] [2021-07-09 18:38:38,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:38,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:38,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:38,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:38,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87716425] [2021-07-09 18:38:38,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87716425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:38,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437208250] [2021-07-09 18:38:38,796 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:38,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:38:38,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:38,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:38:38,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:39,190 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-07-09 18:38:39,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:39,293 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:39,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:38:39,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:39,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:39,306 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:38:39,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:38:39,308 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:39,424 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-07-09 18:38:39,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:39,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:39,447 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:39,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:38:39,450 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:39,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:39,459 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:39,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:38:39,460 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:39,570 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-07-09 18:38:39,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:39,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:39,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:39,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:38:39,585 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:39,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:39,594 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:38:39,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:38:39,595 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:39,700 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-07-09 18:38:39,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:39,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:39,712 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:39,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:38:39,713 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:39,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:39,721 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:38:39,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:38:39,722 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:39,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:39,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:38:39,819 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:333, output treesize:174 [2021-07-09 18:38:39,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:39,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437208250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:39,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:39,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:38:39,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499073308] [2021-07-09 18:38:39,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:38:39,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:39,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:38:39,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:38:39,995 INFO L87 Difference]: Start difference. First operand 1888 states and 6431 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:40,767 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-07-09 18:38:40,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:40,818 INFO L93 Difference]: Finished difference Result 2422 states and 8105 transitions. [2021-07-09 18:38:40,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:38:40,818 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:40,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:40,822 INFO L225 Difference]: With dead ends: 2422 [2021-07-09 18:38:40,822 INFO L226 Difference]: Without dead ends: 2397 [2021-07-09 18:38:40,822 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1253.8ms TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:38:40,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2397 states. [2021-07-09 18:38:40,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2397 to 1888. [2021-07-09 18:38:40,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1887 states have (on average 3.4101748807631163) internal successors, (6435), 1887 states have internal predecessors, (6435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:40,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 6435 transitions. [2021-07-09 18:38:40,847 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 6435 transitions. Word has length 26 [2021-07-09 18:38:40,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:40,847 INFO L482 AbstractCegarLoop]: Abstraction has 1888 states and 6435 transitions. [2021-07-09 18:38:40,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:40,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 6435 transitions. [2021-07-09 18:38:40,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:40,850 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:40,850 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:41,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3136,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:41,052 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:41,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:41,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1537750790, now seen corresponding path program 48 times [2021-07-09 18:38:41,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:41,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89365594] [2021-07-09 18:38:41,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:41,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:41,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:41,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:41,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89365594] [2021-07-09 18:38:41,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89365594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:41,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682049899] [2021-07-09 18:38:41,350 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:41,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:38:41,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:41,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:38:41,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:41,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:41,554 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:41,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:38:41,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:41,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:41,562 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:41,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:38:41,563 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:41,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:41,570 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:41,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:38:41,571 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:41,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:41,580 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:41,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:38:41,582 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:41,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:41,592 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:41,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:38:41,595 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:41,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:41,605 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:41,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:38:41,606 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:41,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:41,613 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:41,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:38:41,614 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:41,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:41,623 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:41,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:38:41,625 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:41,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:41,633 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:41,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-07-09 18:38:41,634 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:41,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:41,644 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:41,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:38:41,647 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:41,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:41,656 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:41,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:38:41,656 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:41,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:41,663 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:41,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:38:41,664 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:41,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:41,684 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:38:41,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:38:41,686 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:41,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:41,697 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:38:41,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:38:41,699 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:41,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:41,710 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:38:41,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:38:41,712 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:41,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:41,718 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:41,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:38:41,718 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:41,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:41,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:38:41,787 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-07-09 18:38:41,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:41,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682049899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:41,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:41,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:38:41,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459811456] [2021-07-09 18:38:41,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:38:41,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:41,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:38:41,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:38:41,978 INFO L87 Difference]: Start difference. First operand 1888 states and 6435 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:42,679 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-07-09 18:38:42,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:42,744 INFO L93 Difference]: Finished difference Result 2430 states and 8144 transitions. [2021-07-09 18:38:42,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:38:42,744 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:42,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:42,748 INFO L225 Difference]: With dead ends: 2430 [2021-07-09 18:38:42,748 INFO L226 Difference]: Without dead ends: 2415 [2021-07-09 18:38:42,748 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1037.2ms TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:38:42,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-07-09 18:38:42,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1888. [2021-07-09 18:38:42,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1887 states have (on average 3.4101748807631163) internal successors, (6435), 1887 states have internal predecessors, (6435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:42,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 6435 transitions. [2021-07-09 18:38:42,773 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 6435 transitions. Word has length 26 [2021-07-09 18:38:42,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:42,773 INFO L482 AbstractCegarLoop]: Abstraction has 1888 states and 6435 transitions. [2021-07-09 18:38:42,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:42,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 6435 transitions. [2021-07-09 18:38:42,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:42,775 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:42,775 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:42,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3169,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:42,976 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:42,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:42,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1872442310, now seen corresponding path program 55 times [2021-07-09 18:38:42,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:42,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73985674] [2021-07-09 18:38:42,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:42,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:43,384 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:43,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:43,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73985674] [2021-07-09 18:38:43,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73985674] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:43,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049350127] [2021-07-09 18:38:43,384 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:43,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:43,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:38:43,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:43,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:43,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-09 18:38:43,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:43,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:43,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-09 18:38:43,885 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:43,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:43,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:38:43,892 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:43,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:43,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-09 18:38:43,900 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:43,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:43,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-09 18:38:43,907 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:43,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:43,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:38:43,914 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:43,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:43,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:38:43,921 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:43,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:43,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:38:43,928 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:43,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:43,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:38:43,935 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:43,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:43,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:38:43,943 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:43,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:43,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:38:43,950 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:43,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:43,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-09 18:38:43,957 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:43,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:43,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:38:43,963 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:43,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:43,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:38:43,970 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:43,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:43,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:43,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:38:43,975 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:44,005 INFO L628 ElimStorePlain]: treesize reduction 34, result has 44.3 percent of original size [2021-07-09 18:38:44,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:38:44,006 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-09 18:38:44,037 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:44,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049350127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:44,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:44,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-09 18:38:44,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120774049] [2021-07-09 18:38:44,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:38:44,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:44,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:38:44,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:38:44,038 INFO L87 Difference]: Start difference. First operand 1888 states and 6435 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:44,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:44,708 INFO L93 Difference]: Finished difference Result 2457 states and 7898 transitions. [2021-07-09 18:38:44,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:38:44,708 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:44,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:44,712 INFO L225 Difference]: With dead ends: 2457 [2021-07-09 18:38:44,712 INFO L226 Difference]: Without dead ends: 2420 [2021-07-09 18:38:44,713 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 953.8ms TimeCoverageRelationStatistics Valid=220, Invalid=902, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:38:44,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2420 states. [2021-07-09 18:38:44,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2420 to 1914. [2021-07-09 18:38:44,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1913 states have (on average 3.410350235232619) internal successors, (6524), 1913 states have internal predecessors, (6524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:44,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 6524 transitions. [2021-07-09 18:38:44,739 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 6524 transitions. Word has length 26 [2021-07-09 18:38:44,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:44,739 INFO L482 AbstractCegarLoop]: Abstraction has 1914 states and 6524 transitions. [2021-07-09 18:38:44,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:44,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 6524 transitions. [2021-07-09 18:38:44,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:44,741 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:44,741 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:44,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3186 [2021-07-09 18:38:44,942 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:44,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:44,942 INFO L82 PathProgramCache]: Analyzing trace with hash -804567746, now seen corresponding path program 56 times [2021-07-09 18:38:44,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:44,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409012656] [2021-07-09 18:38:44,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:44,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:45,192 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:45,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:45,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409012656] [2021-07-09 18:38:45,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409012656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:45,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341804382] [2021-07-09 18:38:45,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:45,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:38:45,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:45,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:38:45,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:45,453 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-07-09 18:38:45,514 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_283, v_prenex_285], 6=[A, v_prenex_287]} [2021-07-09 18:38:45,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:45,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:45,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:45,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-07-09 18:38:45,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:45,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:45,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:45,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:38:45,528 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:45,626 INFO L628 ElimStorePlain]: treesize reduction 166, result has 44.9 percent of original size [2021-07-09 18:38:45,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:45,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:38:45,631 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:45,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:45,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:45,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:45,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-09 18:38:45,668 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:45,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:45,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:45,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:45,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:45,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-09 18:38:45,702 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:45,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:45,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:38:45,729 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:365, output treesize:33 [2021-07-09 18:38:45,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:45,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341804382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:45,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:45,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-09 18:38:45,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155462390] [2021-07-09 18:38:45,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:38:45,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:45,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:38:45,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:38:45,771 INFO L87 Difference]: Start difference. First operand 1914 states and 6524 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:46,568 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-07-09 18:38:46,717 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-07-09 18:38:46,856 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-07-09 18:38:46,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:46,948 INFO L93 Difference]: Finished difference Result 2392 states and 7936 transitions. [2021-07-09 18:38:46,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:38:46,948 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:46,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:46,952 INFO L225 Difference]: With dead ends: 2392 [2021-07-09 18:38:46,952 INFO L226 Difference]: Without dead ends: 2346 [2021-07-09 18:38:46,952 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1330.2ms TimeCoverageRelationStatistics Valid=256, Invalid=866, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:38:46,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2021-07-09 18:38:46,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 1910. [2021-07-09 18:38:46,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1909 states have (on average 3.4038763750654795) internal successors, (6498), 1909 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:46,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 6498 transitions. [2021-07-09 18:38:46,976 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 6498 transitions. Word has length 26 [2021-07-09 18:38:46,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:46,976 INFO L482 AbstractCegarLoop]: Abstraction has 1910 states and 6498 transitions. [2021-07-09 18:38:46,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:46,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 6498 transitions. [2021-07-09 18:38:46,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:46,979 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:46,979 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:47,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3300,105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:47,179 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:47,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:47,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1833133118, now seen corresponding path program 57 times [2021-07-09 18:38:47,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:47,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822273950] [2021-07-09 18:38:47,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:47,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:47,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:47,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:47,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822273950] [2021-07-09 18:38:47,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822273950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:47,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397728129] [2021-07-09 18:38:47,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:47,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:38:47,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:47,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:38:47,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:48,026 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-07-09 18:38:48,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,312 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-07-09 18:38:48,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-07-09 18:38:48,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:48,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,342 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 18:38:48,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-07-09 18:38:48,346 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:48,724 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2021-07-09 18:38:48,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:48,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,754 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-09 18:38:48,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 28 [2021-07-09 18:38:48,756 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:48,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,783 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-09 18:38:48,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 35 [2021-07-09 18:38:48,796 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:49,140 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-07-09 18:38:49,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:49,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:49,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:49,176 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:49,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-07-09 18:38:49,181 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:49,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:49,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:49,196 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:38:49,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-09 18:38:49,197 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:49,506 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2021-07-09 18:38:49,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:49,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:49,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:49,538 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-09 18:38:49,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-07-09 18:38:49,539 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:49,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:49,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:49,561 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-09 18:38:49,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-07-09 18:38:49,563 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:49,852 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-07-09 18:38:49,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:49,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:49,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:49,883 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:49,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 47 [2021-07-09 18:38:49,891 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:49,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:49,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:49,917 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-09 18:38:49,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-07-09 18:38:49,920 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:50,714 WARN L205 SmtUtils]: Spent 793.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 124 [2021-07-09 18:38:50,715 INFO L628 ElimStorePlain]: treesize reduction 40, result has 93.4 percent of original size [2021-07-09 18:38:50,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:50,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:50,745 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-09 18:38:50,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-07-09 18:38:50,749 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:50,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:50,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:50,761 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:38:50,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-07-09 18:38:50,762 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:50,970 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-07-09 18:38:50,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:50,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:50,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:51,010 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-09 18:38:51,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-07-09 18:38:51,011 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:51,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:51,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:51,035 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-09 18:38:51,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:38:51,039 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:51,407 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 99 [2021-07-09 18:38:51,407 INFO L628 ElimStorePlain]: treesize reduction 33, result has 92.7 percent of original size [2021-07-09 18:38:51,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:51,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:51,431 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-07-09 18:38:51,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-07-09 18:38:51,433 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:51,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:51,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:51,451 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:51,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-07-09 18:38:51,459 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:51,622 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-07-09 18:38:51,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:51,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-07-09 18:38:51,634 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:801, output treesize:348 [2021-07-09 18:38:51,789 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 24 [2021-07-09 18:38:51,814 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:51,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397728129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:51,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:51,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 18:38:51,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595225213] [2021-07-09 18:38:51,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:38:51,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:51,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:38:51,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:38:51,815 INFO L87 Difference]: Start difference. First operand 1910 states and 6498 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:52,739 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-07-09 18:38:52,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:52,964 INFO L93 Difference]: Finished difference Result 2172 states and 7282 transitions. [2021-07-09 18:38:52,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:38:52,964 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:52,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:52,968 INFO L225 Difference]: With dead ends: 2172 [2021-07-09 18:38:52,968 INFO L226 Difference]: Without dead ends: 2157 [2021-07-09 18:38:52,968 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1683.9ms TimeCoverageRelationStatistics Valid=197, Invalid=925, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:38:52,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2157 states. [2021-07-09 18:38:52,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2157 to 1922. [2021-07-09 18:38:52,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1922 states, 1921 states have (on average 3.407600208224883) internal successors, (6546), 1921 states have internal predecessors, (6546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:52,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1922 states to 1922 states and 6546 transitions. [2021-07-09 18:38:52,992 INFO L78 Accepts]: Start accepts. Automaton has 1922 states and 6546 transitions. Word has length 26 [2021-07-09 18:38:52,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:52,992 INFO L482 AbstractCegarLoop]: Abstraction has 1922 states and 6546 transitions. [2021-07-09 18:38:52,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:52,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1922 states and 6546 transitions. [2021-07-09 18:38:52,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:52,995 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:52,995 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:53,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3314,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:53,195 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:53,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:53,195 INFO L82 PathProgramCache]: Analyzing trace with hash 179857598, now seen corresponding path program 49 times [2021-07-09 18:38:53,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:53,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500237564] [2021-07-09 18:38:53,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:53,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:53,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:53,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:53,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500237564] [2021-07-09 18:38:53,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500237564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:53,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278905811] [2021-07-09 18:38:53,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:53,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:53,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:38:53,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:53,952 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-07-09 18:38:53,983 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_307, v_prenex_309]} [2021-07-09 18:38:53,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:53,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:38:53,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:54,090 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-07-09 18:38:54,091 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-07-09 18:38:54,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:54,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:54,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:54,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:38:54,097 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:54,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:54,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:54,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:38:54,102 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:54,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:54,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:54,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:54,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:38:54,142 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:54,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:54,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:38:54,177 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-07-09 18:38:54,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:54,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278905811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:54,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:54,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:38:54,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679444802] [2021-07-09 18:38:54,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:38:54,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:54,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:38:54,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:38:54,240 INFO L87 Difference]: Start difference. First operand 1922 states and 6546 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:54,774 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-07-09 18:38:55,095 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-07-09 18:38:55,246 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-07-09 18:38:55,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:55,406 INFO L93 Difference]: Finished difference Result 2493 states and 8257 transitions. [2021-07-09 18:38:55,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:38:55,407 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:55,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:55,410 INFO L225 Difference]: With dead ends: 2493 [2021-07-09 18:38:55,410 INFO L226 Difference]: Without dead ends: 2478 [2021-07-09 18:38:55,411 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1491.7ms TimeCoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:38:55,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2478 states. [2021-07-09 18:38:55,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2478 to 1933. [2021-07-09 18:38:55,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1933 states, 1932 states have (on average 3.4078674948240164) internal successors, (6584), 1932 states have internal predecessors, (6584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:55,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1933 states to 1933 states and 6584 transitions. [2021-07-09 18:38:55,435 INFO L78 Accepts]: Start accepts. Automaton has 1933 states and 6584 transitions. Word has length 26 [2021-07-09 18:38:55,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:55,435 INFO L482 AbstractCegarLoop]: Abstraction has 1933 states and 6584 transitions. [2021-07-09 18:38:55,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:55,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1933 states and 6584 transitions. [2021-07-09 18:38:55,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:55,438 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:55,438 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:55,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3383,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:55,638 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:55,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:55,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1730239162, now seen corresponding path program 58 times [2021-07-09 18:38:55,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:55,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748986437] [2021-07-09 18:38:55,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:55,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:55,893 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:55,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:55,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748986437] [2021-07-09 18:38:55,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748986437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:55,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127460748] [2021-07-09 18:38:55,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:55,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:38:55,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:55,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:38:55,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:56,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:56,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:38:56,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:56,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:56,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:38:56,433 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:56,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:56,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:38:56,440 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:56,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:56,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-09 18:38:56,447 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:56,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:56,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-09 18:38:56,454 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:56,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:56,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:38:56,461 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:56,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:56,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:38:56,468 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:56,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:56,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-09 18:38:56,475 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:56,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:56,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:38:56,482 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:56,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:56,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:38:56,489 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:56,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:56,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-09 18:38:56,496 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:56,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:56,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:38:56,503 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:56,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:56,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:38:56,509 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:56,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:56,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:38:56,515 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:56,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:56,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:56,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-09 18:38:56,520 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:56,544 INFO L628 ElimStorePlain]: treesize reduction 34, result has 44.3 percent of original size [2021-07-09 18:38:56,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:38:56,545 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-09 18:38:56,571 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:56,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127460748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:56,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:56,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-09 18:38:56,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124325301] [2021-07-09 18:38:56,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:38:56,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:56,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:38:56,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:38:56,572 INFO L87 Difference]: Start difference. First operand 1933 states and 6584 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:57,018 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-07-09 18:38:57,334 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-07-09 18:38:57,804 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-07-09 18:38:58,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:58,128 INFO L93 Difference]: Finished difference Result 3085 states and 9838 transitions. [2021-07-09 18:38:58,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:38:58,129 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:58,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:58,134 INFO L225 Difference]: With dead ends: 3085 [2021-07-09 18:38:58,134 INFO L226 Difference]: Without dead ends: 3042 [2021-07-09 18:38:58,134 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1621.1ms TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:38:58,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3042 states. [2021-07-09 18:38:58,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3042 to 2025. [2021-07-09 18:38:58,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2025 states, 2024 states have (on average 3.4234189723320156) internal successors, (6929), 2024 states have internal predecessors, (6929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:58,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2025 states to 2025 states and 6929 transitions. [2021-07-09 18:38:58,166 INFO L78 Accepts]: Start accepts. Automaton has 2025 states and 6929 transitions. Word has length 26 [2021-07-09 18:38:58,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:58,166 INFO L482 AbstractCegarLoop]: Abstraction has 2025 states and 6929 transitions. [2021-07-09 18:38:58,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:58,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2025 states and 6929 transitions. [2021-07-09 18:38:58,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:58,168 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:58,168 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:38:58,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3392 [2021-07-09 18:38:58,369 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:58,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:58,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1769727974, now seen corresponding path program 50 times [2021-07-09 18:38:58,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:58,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607626798] [2021-07-09 18:38:58,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:58,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:58,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:58,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:58,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607626798] [2021-07-09 18:38:58,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607626798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:58,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493975780] [2021-07-09 18:38:58,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:58,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:38:58,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:58,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:38:58,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:59,286 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-07-09 18:38:59,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:59,864 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:38:59,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:38:59,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:00,030 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-07-09 18:39:00,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:00,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:00,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:00,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:39:00,052 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:00,206 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-07-09 18:39:00,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:00,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:00,231 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:39:00,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:39:00,234 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:00,385 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2021-07-09 18:39:00,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:00,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:00,404 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:00,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:39:00,406 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:00,555 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2021-07-09 18:39:00,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:00,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:00,577 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:39:00,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:39:00,578 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:00,722 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-07-09 18:39:00,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:00,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:00,745 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:39:00,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-07-09 18:39:00,749 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:00,889 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 18:39:00,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:00,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:00,906 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:00,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-09 18:39:00,913 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:01,046 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-07-09 18:39:01,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:01,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:01,068 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:39:01,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:39:01,070 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:01,200 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-07-09 18:39:01,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:01,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:39:01,223 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:381, output treesize:513 [2021-07-09 18:39:01,564 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2021-07-09 18:39:01,837 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-07-09 18:39:01,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:01,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493975780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:01,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:01,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:39:01,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403587063] [2021-07-09 18:39:01,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:39:01,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:01,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:39:01,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:39:01,947 INFO L87 Difference]: Start difference. First operand 2025 states and 6929 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:02,829 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 75 [2021-07-09 18:39:03,600 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 69 [2021-07-09 18:39:04,214 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 82 [2021-07-09 18:39:04,462 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2021-07-09 18:39:04,932 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 120 [2021-07-09 18:39:05,408 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 94 [2021-07-09 18:39:05,896 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 119 [2021-07-09 18:39:06,417 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 138 [2021-07-09 18:39:06,806 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2021-07-09 18:39:07,344 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 140 [2021-07-09 18:39:07,685 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 84 [2021-07-09 18:39:08,139 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 97 [2021-07-09 18:39:08,600 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 69 [2021-07-09 18:39:08,880 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 41 [2021-07-09 18:39:09,476 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 91 [2021-07-09 18:39:09,792 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 42 [2021-07-09 18:39:10,228 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 57 [2021-07-09 18:39:10,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:10,321 INFO L93 Difference]: Finished difference Result 2870 states and 9420 transitions. [2021-07-09 18:39:10,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:39:10,321 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:39:10,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:10,326 INFO L225 Difference]: With dead ends: 2870 [2021-07-09 18:39:10,326 INFO L226 Difference]: Without dead ends: 2855 [2021-07-09 18:39:10,326 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 8702.4ms TimeCoverageRelationStatistics Valid=408, Invalid=2142, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:39:10,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2855 states. [2021-07-09 18:39:10,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2855 to 2033. [2021-07-09 18:39:10,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 2032 states have (on average 3.4247047244094486) internal successors, (6959), 2032 states have internal predecessors, (6959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:10,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 6959 transitions. [2021-07-09 18:39:10,356 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 6959 transitions. Word has length 26 [2021-07-09 18:39:10,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:10,356 INFO L482 AbstractCegarLoop]: Abstraction has 2033 states and 6959 transitions. [2021-07-09 18:39:10,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:10,356 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 6959 transitions. [2021-07-09 18:39:10,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:39:10,359 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:10,359 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:10,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3498,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:10,560 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:10,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:10,561 INFO L82 PathProgramCache]: Analyzing trace with hash 719147274, now seen corresponding path program 51 times [2021-07-09 18:39:10,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:10,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196781107] [2021-07-09 18:39:10,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:10,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:10,828 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-07-09 18:39:10,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:10,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:10,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196781107] [2021-07-09 18:39:10,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196781107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:10,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533998217] [2021-07-09 18:39:10,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:11,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:39:11,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:11,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:39:11,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:11,320 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-07-09 18:39:11,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:11,375 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:11,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:39:11,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:11,485 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-07-09 18:39:11,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:11,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:11,497 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:39:11,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:39:11,499 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:11,606 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-07-09 18:39:11,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:11,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:11,618 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:39:11,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:39:11,619 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:11,721 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-07-09 18:39:11,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:11,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:11,733 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:39:11,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:39:11,734 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:11,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:11,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:11,845 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:11,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:39:11,847 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:11,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:11,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:11,956 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:11,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:39:11,958 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:12,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:12,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:12,064 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:12,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:39:12,067 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:12,169 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-07-09 18:39:12,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:12,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:12,178 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:12,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:39:12,182 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:12,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:12,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:39:12,272 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-07-09 18:39:12,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:12,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533998217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:12,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:12,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:39:12,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445341853] [2021-07-09 18:39:12,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:39:12,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:12,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:39:12,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:39:12,447 INFO L87 Difference]: Start difference. First operand 2033 states and 6959 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:12,811 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-07-09 18:39:13,701 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-07-09 18:39:13,846 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-07-09 18:39:14,044 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-07-09 18:39:14,215 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 70 [2021-07-09 18:39:14,551 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-07-09 18:39:14,737 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-07-09 18:39:14,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:14,833 INFO L93 Difference]: Finished difference Result 2982 states and 9848 transitions. [2021-07-09 18:39:14,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:39:14,833 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:39:14,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:14,838 INFO L225 Difference]: With dead ends: 2982 [2021-07-09 18:39:14,838 INFO L226 Difference]: Without dead ends: 2967 [2021-07-09 18:39:14,838 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 2642.5ms TimeCoverageRelationStatistics Valid=300, Invalid=1032, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:39:14,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2967 states. [2021-07-09 18:39:14,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2967 to 2028. [2021-07-09 18:39:14,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 3.4257523433645782) internal successors, (6944), 2027 states have internal predecessors, (6944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:14,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 6944 transitions. [2021-07-09 18:39:14,868 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 6944 transitions. Word has length 26 [2021-07-09 18:39:14,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:14,868 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 6944 transitions. [2021-07-09 18:39:14,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:14,868 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 6944 transitions. [2021-07-09 18:39:14,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:39:14,870 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:14,870 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:15,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3564,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:15,071 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:15,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:15,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1956232686, now seen corresponding path program 59 times [2021-07-09 18:39:15,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:15,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262939262] [2021-07-09 18:39:15,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:15,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:15,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:15,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:15,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262939262] [2021-07-09 18:39:15,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262939262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:15,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960362920] [2021-07-09 18:39:15,319 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:15,343 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:39:15,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:15,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:39:15,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:15,769 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-07-09 18:39:16,119 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 116 [2021-07-09 18:39:16,338 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 66 [2021-07-09 18:39:16,556 INFO L446 ElimStorePlain]: Different costs {20=[v_prenex_385], 27=[A]} [2021-07-09 18:39:16,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:16,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:16,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:16,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:16,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:16,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:39:16,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:16,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:16,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:16,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:16,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:16,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:39:16,577 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:16,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:16,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:16,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:16,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:16,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:39:16,587 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:16,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:16,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:16,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:16,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-07-09 18:39:16,594 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:16,719 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2021-07-09 18:39:16,719 INFO L628 ElimStorePlain]: treesize reduction 114, result has 56.3 percent of original size [2021-07-09 18:39:16,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:16,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-09 18:39:16,725 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:16,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:16,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:16,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:39:16,733 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:16,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:16,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:39:16,779 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 11 variables, input treesize:399, output treesize:89 [2021-07-09 18:39:16,854 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:16,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960362920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:16,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:16,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-07-09 18:39:16,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688096637] [2021-07-09 18:39:16,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:39:16,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:16,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:39:16,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:39:16,855 INFO L87 Difference]: Start difference. First operand 2028 states and 6944 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:17,618 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-07-09 18:39:18,040 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 97 [2021-07-09 18:39:18,231 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-07-09 18:39:18,598 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 71 [2021-07-09 18:39:18,968 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2021-07-09 18:39:19,254 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 55 [2021-07-09 18:39:19,660 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 102 [2021-07-09 18:39:20,031 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 125 [2021-07-09 18:39:20,270 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 47 [2021-07-09 18:39:20,684 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 60 [2021-07-09 18:39:20,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:20,787 INFO L93 Difference]: Finished difference Result 3633 states and 11658 transitions. [2021-07-09 18:39:20,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:39:20,787 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:39:20,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:20,793 INFO L225 Difference]: With dead ends: 3633 [2021-07-09 18:39:20,793 INFO L226 Difference]: Without dead ends: 3546 [2021-07-09 18:39:20,794 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 4286.9ms TimeCoverageRelationStatistics Valid=391, Invalid=1679, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:39:20,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3546 states. [2021-07-09 18:39:20,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3546 to 2151. [2021-07-09 18:39:20,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2151 states, 2150 states have (on average 3.4288372093023254) internal successors, (7372), 2150 states have internal predecessors, (7372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:20,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2151 states to 2151 states and 7372 transitions. [2021-07-09 18:39:20,829 INFO L78 Accepts]: Start accepts. Automaton has 2151 states and 7372 transitions. Word has length 26 [2021-07-09 18:39:20,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:20,829 INFO L482 AbstractCegarLoop]: Abstraction has 2151 states and 7372 transitions. [2021-07-09 18:39:20,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:20,829 INFO L276 IsEmpty]: Start isEmpty. Operand 2151 states and 7372 transitions. [2021-07-09 18:39:20,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:39:20,832 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:20,832 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:21,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3579,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:21,032 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:21,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:21,032 INFO L82 PathProgramCache]: Analyzing trace with hash -505085958, now seen corresponding path program 60 times [2021-07-09 18:39:21,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:21,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561551922] [2021-07-09 18:39:21,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:21,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:21,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:21,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:21,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561551922] [2021-07-09 18:39:21,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561551922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:21,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24470727] [2021-07-09 18:39:21,276 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:21,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:39:21,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:21,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:39:21,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:21,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,567 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:21,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 53 [2021-07-09 18:39:21,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:39:21,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,612 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-07-09 18:39:21,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 44 [2021-07-09 18:39:21,616 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:21,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,653 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-07-09 18:39:21,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 40 [2021-07-09 18:39:21,658 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:21,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,676 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-09 18:39:21,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 1 [2021-07-09 18:39:21,677 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:21,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,704 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-07-09 18:39:21,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 27 [2021-07-09 18:39:21,705 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:21,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,732 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-07-09 18:39:21,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 22 [2021-07-09 18:39:21,733 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:21,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,750 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-09 18:39:21,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 1 [2021-07-09 18:39:21,751 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:21,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,768 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-09 18:39:21,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 1 [2021-07-09 18:39:21,769 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:21,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,787 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-09 18:39:21,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 1 [2021-07-09 18:39:21,788 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:21,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,805 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-09 18:39:21,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 1 [2021-07-09 18:39:21,805 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:21,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,823 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-09 18:39:21,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 1 [2021-07-09 18:39:21,823 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:21,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,840 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-09 18:39:21,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 1 [2021-07-09 18:39:21,841 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:21,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,857 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-09 18:39:21,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-09 18:39:21,857 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:21,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,883 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-07-09 18:39:21,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 20 [2021-07-09 18:39:21,884 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:21,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,903 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-09 18:39:21,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 1 [2021-07-09 18:39:21,904 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:21,907 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 18:39:21,907 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:22,004 INFO L628 ElimStorePlain]: treesize reduction 115, result has 45.2 percent of original size [2021-07-09 18:39:22,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:39:22,005 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:833, output treesize:95 [2021-07-09 18:39:22,169 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:22,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24470727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:22,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:22,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-09 18:39:22,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605626966] [2021-07-09 18:39:22,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:39:22,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:22,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:39:22,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:39:22,170 INFO L87 Difference]: Start difference. First operand 2151 states and 7372 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:23,450 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 44 [2021-07-09 18:39:23,818 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-07-09 18:39:24,030 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2021-07-09 18:39:24,156 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-07-09 18:39:24,355 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 65 [2021-07-09 18:39:24,635 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2021-07-09 18:39:25,044 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-07-09 18:39:25,547 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 36 [2021-07-09 18:39:25,712 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-07-09 18:39:26,033 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 38 [2021-07-09 18:39:26,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:26,147 INFO L93 Difference]: Finished difference Result 3952 states and 12614 transitions. [2021-07-09 18:39:26,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:39:26,147 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:39:26,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:26,153 INFO L225 Difference]: With dead ends: 3952 [2021-07-09 18:39:26,153 INFO L226 Difference]: Without dead ends: 3864 [2021-07-09 18:39:26,154 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 3609.6ms TimeCoverageRelationStatistics Valid=560, Invalid=2980, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:39:26,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3864 states. [2021-07-09 18:39:26,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3864 to 2137. [2021-07-09 18:39:26,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 2136 states have (on average 3.431179775280899) internal successors, (7329), 2136 states have internal predecessors, (7329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:26,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 7329 transitions. [2021-07-09 18:39:26,191 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 7329 transitions. Word has length 26 [2021-07-09 18:39:26,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:26,191 INFO L482 AbstractCegarLoop]: Abstraction has 2137 states and 7329 transitions. [2021-07-09 18:39:26,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:26,191 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 7329 transitions. [2021-07-09 18:39:26,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:39:26,194 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:26,194 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:26,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3601 [2021-07-09 18:39:26,401 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:26,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:26,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1912368818, now seen corresponding path program 52 times [2021-07-09 18:39:26,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:26,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346265046] [2021-07-09 18:39:26,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:26,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:26,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:26,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:26,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346265046] [2021-07-09 18:39:26,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346265046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:26,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174434683] [2021-07-09 18:39:26,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:26,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:39:26,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:26,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:39:26,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:27,171 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-07-09 18:39:27,392 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_397, v_prenex_398]} [2021-07-09 18:39:27,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:27,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:39:27,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:27,499 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-07-09 18:39:27,499 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-07-09 18:39:27,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:27,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:27,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:39:27,504 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:27,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:27,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:27,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:27,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:27,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:39:27,551 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:27,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:27,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:27,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:39:27,555 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:27,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:27,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:39:27,591 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-07-09 18:39:27,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:27,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174434683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:27,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:27,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:39:27,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322735177] [2021-07-09 18:39:27,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:39:27,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:27,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:39:27,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:39:27,645 INFO L87 Difference]: Start difference. First operand 2137 states and 7329 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:28,487 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-07-09 18:39:28,649 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-07-09 18:39:29,015 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-07-09 18:39:29,229 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2021-07-09 18:39:29,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:29,367 INFO L93 Difference]: Finished difference Result 2703 states and 9088 transitions. [2021-07-09 18:39:29,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:39:29,367 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:39:29,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:29,372 INFO L225 Difference]: With dead ends: 2703 [2021-07-09 18:39:29,372 INFO L226 Difference]: Without dead ends: 2688 [2021-07-09 18:39:29,372 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 2058.2ms TimeCoverageRelationStatistics Valid=229, Invalid=961, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:39:29,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2688 states. [2021-07-09 18:39:29,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2688 to 2150. [2021-07-09 18:39:29,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2150 states, 2149 states have (on average 3.4290367612843182) internal successors, (7369), 2149 states have internal predecessors, (7369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:29,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2150 states to 2150 states and 7369 transitions. [2021-07-09 18:39:29,399 INFO L78 Accepts]: Start accepts. Automaton has 2150 states and 7369 transitions. Word has length 26 [2021-07-09 18:39:29,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:29,400 INFO L482 AbstractCegarLoop]: Abstraction has 2150 states and 7369 transitions. [2021-07-09 18:39:29,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:29,400 INFO L276 IsEmpty]: Start isEmpty. Operand 2150 states and 7369 transitions. [2021-07-09 18:39:29,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:39:29,402 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:29,402 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:29,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3633,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:29,603 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:29,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:29,603 INFO L82 PathProgramCache]: Analyzing trace with hash 294836038, now seen corresponding path program 53 times [2021-07-09 18:39:29,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:29,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289787220] [2021-07-09 18:39:29,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:29,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:29,873 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-07-09 18:39:29,988 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-07-09 18:39:30,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:30,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:30,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289787220] [2021-07-09 18:39:30,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289787220] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:30,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405188846] [2021-07-09 18:39:30,097 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:30,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:39:30,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:30,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:39:30,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:30,652 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-07-09 18:39:30,750 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_421, v_prenex_410, v_prenex_412], 6=[v_prenex_415, v_prenex_405, v_prenex_418, v_prenex_408]} [2021-07-09 18:39:30,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:30,778 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:39:30,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-07-09 18:39:30,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:31,122 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 156 [2021-07-09 18:39:31,122 INFO L628 ElimStorePlain]: treesize reduction 226, result has 61.6 percent of original size [2021-07-09 18:39:31,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:31,146 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:39:31,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:39:31,147 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:31,284 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-07-09 18:39:31,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:31,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:31,307 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:39:31,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:39:31,310 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:31,443 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-07-09 18:39:31,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:31,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:31,462 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:31,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:39:31,466 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:31,726 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 142 [2021-07-09 18:39:31,727 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.3 percent of original size [2021-07-09 18:39:31,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:31,744 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:31,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-09 18:39:31,749 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:31,872 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-07-09 18:39:31,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:31,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:31,890 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:31,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 32 [2021-07-09 18:39:31,895 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:32,137 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 125 [2021-07-09 18:39:32,137 INFO L628 ElimStorePlain]: treesize reduction 12, result has 96.0 percent of original size [2021-07-09 18:39:32,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:32,156 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:39:32,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:39:32,157 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:32,268 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-07-09 18:39:32,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:32,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:32,287 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:39:32,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:39:32,288 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:32,398 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-07-09 18:39:32,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:32,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:39:32,416 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:599, output treesize:334 [2021-07-09 18:39:32,617 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-07-09 18:39:32,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:32,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405188846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:32,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:32,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:39:32,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875394486] [2021-07-09 18:39:32,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:39:32,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:32,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:39:32,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:39:32,714 INFO L87 Difference]: Start difference. First operand 2150 states and 7369 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:33,317 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 32 [2021-07-09 18:39:33,741 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2021-07-09 18:39:33,938 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-07-09 18:39:34,267 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 80 [2021-07-09 18:39:34,473 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-07-09 18:39:34,811 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2021-07-09 18:39:35,041 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-07-09 18:39:35,441 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 103 [2021-07-09 18:39:35,784 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2021-07-09 18:39:35,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:35,847 INFO L93 Difference]: Finished difference Result 3064 states and 10226 transitions. [2021-07-09 18:39:35,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:39:35,848 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:39:35,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:35,853 INFO L225 Difference]: With dead ends: 3064 [2021-07-09 18:39:35,853 INFO L226 Difference]: Without dead ends: 3049 [2021-07-09 18:39:35,853 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 3591.6ms TimeCoverageRelationStatistics Valid=296, Invalid=1110, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:39:35,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2021-07-09 18:39:35,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 2147. [2021-07-09 18:39:35,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2147 states, 2146 states have (on average 3.428238583410997) internal successors, (7357), 2146 states have internal predecessors, (7357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:35,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 7357 transitions. [2021-07-09 18:39:35,884 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 7357 transitions. Word has length 26 [2021-07-09 18:39:35,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:35,884 INFO L482 AbstractCegarLoop]: Abstraction has 2147 states and 7357 transitions. [2021-07-09 18:39:35,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:35,884 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 7357 transitions. [2021-07-09 18:39:35,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:39:35,887 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:35,887 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:36,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3643,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:36,087 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:36,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:36,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1962058946, now seen corresponding path program 54 times [2021-07-09 18:39:36,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:36,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896288990] [2021-07-09 18:39:36,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:36,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:36,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:36,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:36,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896288990] [2021-07-09 18:39:36,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896288990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:36,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113662072] [2021-07-09 18:39:36,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:36,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:39:36,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:36,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:39:36,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:36,848 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-07-09 18:39:36,900 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_426, v_prenex_425], 6=[A, v_prenex_427]} [2021-07-09 18:39:36,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:36,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:36,913 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:36,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 30 [2021-07-09 18:39:36,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:36,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:36,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:36,926 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-09 18:39:36,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-07-09 18:39:36,928 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:37,061 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-07-09 18:39:37,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:37,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:37,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:37,074 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:37,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-07-09 18:39:37,078 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:37,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:37,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:37,089 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-09 18:39:37,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-07-09 18:39:37,091 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:37,213 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-07-09 18:39:37,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:37,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:37,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:37,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:37,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:37,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:37,228 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:37,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2021-07-09 18:39:37,232 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:37,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:37,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:37,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:37,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:37,244 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-09 18:39:37,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 24 [2021-07-09 18:39:37,245 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:37,354 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-07-09 18:39:37,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:37,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:37,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:37,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:37,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:37,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:37,369 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:37,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-07-09 18:39:37,371 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:37,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:37,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:37,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:37,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:37,381 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:37,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-07-09 18:39:37,383 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:37,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:37,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:39:37,487 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:409, output treesize:246 [2021-07-09 18:39:37,642 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-07-09 18:39:37,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:37,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113662072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:37,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:37,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:39:37,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800317634] [2021-07-09 18:39:37,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:39:37,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:37,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:39:37,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:39:37,742 INFO L87 Difference]: Start difference. First operand 2147 states and 7357 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:38,439 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-07-09 18:39:39,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:39,214 INFO L93 Difference]: Finished difference Result 2844 states and 9528 transitions. [2021-07-09 18:39:39,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:39:39,214 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:39:39,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:39,219 INFO L225 Difference]: With dead ends: 2844 [2021-07-09 18:39:39,219 INFO L226 Difference]: Without dead ends: 2819 [2021-07-09 18:39:39,219 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1810.1ms TimeCoverageRelationStatistics Valid=215, Invalid=841, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:39:39,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2819 states. [2021-07-09 18:39:39,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2819 to 2143. [2021-07-09 18:39:39,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2143 states, 2142 states have (on average 3.429971988795518) internal successors, (7347), 2142 states have internal predecessors, (7347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:39,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2143 states to 2143 states and 7347 transitions. [2021-07-09 18:39:39,247 INFO L78 Accepts]: Start accepts. Automaton has 2143 states and 7347 transitions. Word has length 26 [2021-07-09 18:39:39,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:39,247 INFO L482 AbstractCegarLoop]: Abstraction has 2143 states and 7347 transitions. [2021-07-09 18:39:39,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:39,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2143 states and 7347 transitions. [2021-07-09 18:39:39,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:39:39,250 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:39,250 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:39,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3689,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:39,450 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:39,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:39,451 INFO L82 PathProgramCache]: Analyzing trace with hash 935709652, now seen corresponding path program 61 times [2021-07-09 18:39:39,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:39,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288703018] [2021-07-09 18:39:39,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:39,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:39,769 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:39,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:39,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288703018] [2021-07-09 18:39:39,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288703018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:39,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840810064] [2021-07-09 18:39:39,769 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:39,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:39,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:39:39,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:40,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:40,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:39:40,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:40,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:40,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:39:40,259 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:40,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:40,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-09 18:39:40,266 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:40,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:40,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:39:40,273 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:40,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:40,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:39:40,280 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:40,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:40,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-09 18:39:40,287 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:40,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:40,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-09 18:39:40,294 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:40,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:40,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-09 18:39:40,301 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:40,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:40,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:39:40,308 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:40,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:40,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:39:40,315 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:40,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:40,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:39:40,322 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:40,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:40,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:39:40,329 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:40,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:40,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:39:40,335 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:40,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:40,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:39:40,342 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:40,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:40,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:40,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-09 18:39:40,346 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:40,370 INFO L628 ElimStorePlain]: treesize reduction 34, result has 44.3 percent of original size [2021-07-09 18:39:40,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:39:40,371 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-07-09 18:39:40,386 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:40,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840810064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:40,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:40,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-09 18:39:40,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805947321] [2021-07-09 18:39:40,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:39:40,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:40,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:39:40,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:39:40,387 INFO L87 Difference]: Start difference. First operand 2143 states and 7347 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:41,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:41,655 INFO L93 Difference]: Finished difference Result 2873 states and 9612 transitions. [2021-07-09 18:39:41,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:39:41,655 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:39:41,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:41,660 INFO L225 Difference]: With dead ends: 2873 [2021-07-09 18:39:41,660 INFO L226 Difference]: Without dead ends: 2851 [2021-07-09 18:39:41,660 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 1269.0ms TimeCoverageRelationStatistics Valid=334, Invalid=1148, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:39:41,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-07-09 18:39:41,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2169. [2021-07-09 18:39:41,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2169 states, 2168 states have (on average 3.4321955719557193) internal successors, (7441), 2168 states have internal predecessors, (7441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:41,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 7441 transitions. [2021-07-09 18:39:41,689 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 7441 transitions. Word has length 26 [2021-07-09 18:39:41,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:41,689 INFO L482 AbstractCegarLoop]: Abstraction has 2169 states and 7441 transitions. [2021-07-09 18:39:41,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:41,690 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 7441 transitions. [2021-07-09 18:39:41,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:39:41,692 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:41,692 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:41,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3710 [2021-07-09 18:39:41,893 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:41,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:41,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1861203518, now seen corresponding path program 62 times [2021-07-09 18:39:41,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:41,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807801820] [2021-07-09 18:39:41,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:41,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:42,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:42,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:42,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807801820] [2021-07-09 18:39:42,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807801820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:42,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235444237] [2021-07-09 18:39:42,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:42,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:39:42,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:42,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:39:42,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:42,460 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-07-09 18:39:42,507 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_428, v_prenex_432], 5=[A, v_prenex_430]} [2021-07-09 18:39:42,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:42,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:42,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:42,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:42,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:39:42,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:42,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:42,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:42,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:42,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-09 18:39:42,521 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:42,601 INFO L628 ElimStorePlain]: treesize reduction 147, result has 42.6 percent of original size [2021-07-09 18:39:42,601 INFO L518 ElimStorePlain]: Eliminatee v_prenex_432 vanished before elimination [2021-07-09 18:39:42,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:42,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:42,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:42,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:42,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:39:42,607 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:42,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:42,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:42,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:42,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:42,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-09 18:39:42,638 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:42,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:42,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:39:42,663 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:314, output treesize:33 [2021-07-09 18:39:42,706 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:42,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235444237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:42,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:42,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-09 18:39:42,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786534813] [2021-07-09 18:39:42,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:39:42,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:42,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:39:42,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:39:42,707 INFO L87 Difference]: Start difference. First operand 2169 states and 7441 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:44,152 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-07-09 18:39:44,279 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-07-09 18:39:44,423 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-07-09 18:39:44,567 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-07-09 18:39:44,698 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-07-09 18:39:44,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:44,921 INFO L93 Difference]: Finished difference Result 3222 states and 10652 transitions. [2021-07-09 18:39:44,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:39:44,921 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:39:44,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:44,926 INFO L225 Difference]: With dead ends: 3222 [2021-07-09 18:39:44,926 INFO L226 Difference]: Without dead ends: 3182 [2021-07-09 18:39:44,926 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 2255.8ms TimeCoverageRelationStatistics Valid=527, Invalid=1825, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:39:44,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2021-07-09 18:39:44,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 2156. [2021-07-09 18:39:44,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2156 states, 2155 states have (on average 3.432018561484919) internal successors, (7396), 2155 states have internal predecessors, (7396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:44,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2156 states to 2156 states and 7396 transitions. [2021-07-09 18:39:44,956 INFO L78 Accepts]: Start accepts. Automaton has 2156 states and 7396 transitions. Word has length 26 [2021-07-09 18:39:44,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:44,956 INFO L482 AbstractCegarLoop]: Abstraction has 2156 states and 7396 transitions. [2021-07-09 18:39:44,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:44,956 INFO L276 IsEmpty]: Start isEmpty. Operand 2156 states and 7396 transitions. [2021-07-09 18:39:44,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:39:44,958 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:44,959 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:45,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3816,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:45,159 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:45,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:45,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1633671286, now seen corresponding path program 55 times [2021-07-09 18:39:45,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:45,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58707002] [2021-07-09 18:39:45,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:45,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:45,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:45,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:45,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58707002] [2021-07-09 18:39:45,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58707002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:45,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544362463] [2021-07-09 18:39:45,529 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:45,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:45,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:39:45,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:45,952 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-07-09 18:39:46,199 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 49 [2021-07-09 18:39:46,252 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_443, v_prenex_444], 2=[A, v_prenex_445]} [2021-07-09 18:39:46,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:46,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-09 18:39:46,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:46,364 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-07-09 18:39:46,365 INFO L628 ElimStorePlain]: treesize reduction 54, result has 72.3 percent of original size [2021-07-09 18:39:46,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:46,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:39:46,369 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:46,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:46,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:46,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:46,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:39:46,418 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:46,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:46,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:46,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:46,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:46,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:39:46,464 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:46,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:46,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:46,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:39:46,469 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:46,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:46,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:39:46,503 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:207, output treesize:51 [2021-07-09 18:39:46,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:46,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544362463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:46,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:46,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:39:46,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964020593] [2021-07-09 18:39:46,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:39:46,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:46,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:39:46,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:39:46,556 INFO L87 Difference]: Start difference. First operand 2156 states and 7396 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:47,419 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-07-09 18:39:47,814 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 70 [2021-07-09 18:39:47,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:47,960 INFO L93 Difference]: Finished difference Result 2279 states and 7717 transitions. [2021-07-09 18:39:47,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:39:47,960 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:39:47,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:47,964 INFO L225 Difference]: With dead ends: 2279 [2021-07-09 18:39:47,964 INFO L226 Difference]: Without dead ends: 2264 [2021-07-09 18:39:47,964 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1844.0ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:39:47,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-07-09 18:39:47,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 2159. [2021-07-09 18:39:47,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2159 states, 2158 states have (on average 3.4300278035217793) internal successors, (7402), 2158 states have internal predecessors, (7402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:47,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2159 states to 2159 states and 7402 transitions. [2021-07-09 18:39:47,989 INFO L78 Accepts]: Start accepts. Automaton has 2159 states and 7402 transitions. Word has length 26 [2021-07-09 18:39:47,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:47,989 INFO L482 AbstractCegarLoop]: Abstraction has 2159 states and 7402 transitions. [2021-07-09 18:39:47,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:47,989 INFO L276 IsEmpty]: Start isEmpty. Operand 2159 states and 7402 transitions. [2021-07-09 18:39:47,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:39:47,992 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:47,992 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:48,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3830,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:48,192 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:48,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:48,192 INFO L82 PathProgramCache]: Analyzing trace with hash 16138506, now seen corresponding path program 56 times [2021-07-09 18:39:48,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:48,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239873784] [2021-07-09 18:39:48,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:48,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:48,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:48,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:48,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239873784] [2021-07-09 18:39:48,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239873784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:48,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493069249] [2021-07-09 18:39:48,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:48,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:39:48,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:48,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:39:48,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:48,951 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-07-09 18:39:49,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:49,008 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:39:49,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:39:49,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:49,117 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-07-09 18:39:49,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:49,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:49,130 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:39:49,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:39:49,131 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:49,235 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-07-09 18:39:49,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:49,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:49,247 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:49,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:39:49,250 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:49,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:49,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:49,359 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:39:49,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:39:49,360 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:49,469 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-07-09 18:39:49,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:49,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:49,480 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:49,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:39:49,481 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:49,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:49,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:49,590 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:49,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:39:49,592 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:49,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:49,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:49,693 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:49,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:39:49,696 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:49,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:49,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:49,793 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:49,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:39:49,794 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:49,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:49,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:39:49,883 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-07-09 18:39:50,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:50,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493069249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:50,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:50,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:39:50,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192323723] [2021-07-09 18:39:50,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:39:50,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:50,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:39:50,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:39:50,058 INFO L87 Difference]: Start difference. First operand 2159 states and 7402 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:50,362 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-07-09 18:39:51,153 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-07-09 18:39:51,633 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2021-07-09 18:39:51,949 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-07-09 18:39:52,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:52,157 INFO L93 Difference]: Finished difference Result 3021 states and 10110 transitions. [2021-07-09 18:39:52,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:39:52,157 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:39:52,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:52,162 INFO L225 Difference]: With dead ends: 3021 [2021-07-09 18:39:52,162 INFO L226 Difference]: Without dead ends: 3006 [2021-07-09 18:39:52,162 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 2371.1ms TimeCoverageRelationStatistics Valid=217, Invalid=839, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:39:52,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3006 states. [2021-07-09 18:39:52,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3006 to 2153. [2021-07-09 18:39:52,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 3.427973977695167) internal successors, (7377), 2152 states have internal predecessors, (7377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:52,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 7377 transitions. [2021-07-09 18:39:52,193 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 7377 transitions. Word has length 26 [2021-07-09 18:39:52,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:52,194 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 7377 transitions. [2021-07-09 18:39:52,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:52,194 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 7377 transitions. [2021-07-09 18:39:52,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:39:52,196 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:52,196 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:52,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3842 [2021-07-09 18:39:52,399 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:52,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:52,399 INFO L82 PathProgramCache]: Analyzing trace with hash 2054210818, now seen corresponding path program 57 times [2021-07-09 18:39:52,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:52,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549913739] [2021-07-09 18:39:52,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:52,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:52,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:52,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:52,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549913739] [2021-07-09 18:39:52,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549913739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:52,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020452515] [2021-07-09 18:39:52,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:52,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:39:52,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:52,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:39:52,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:53,183 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_469], 3=[v_prenex_467, v_prenex_468]} [2021-07-09 18:39:53,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:53,197 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:53,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:39:53,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:53,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:53,208 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:53,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:39:53,211 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:53,350 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-07-09 18:39:53,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:53,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:53,364 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:39:53,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:39:53,366 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:53,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:53,376 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:53,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:39:53,377 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:53,503 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-07-09 18:39:53,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:53,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:53,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:53,516 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:53,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-07-09 18:39:53,520 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:53,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:53,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:53,531 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-09 18:39:53,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2021-07-09 18:39:53,532 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:53,644 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-07-09 18:39:53,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:53,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:53,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:53,656 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-09 18:39:53,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 19 [2021-07-09 18:39:53,658 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:53,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:53,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:53,666 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:53,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-07-09 18:39:53,670 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:53,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:53,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:39:53,773 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:365, output treesize:194 [2021-07-09 18:39:53,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:53,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020452515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:53,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:53,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:39:53,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870507308] [2021-07-09 18:39:53,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:39:53,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:53,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:39:53,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:39:53,952 INFO L87 Difference]: Start difference. First operand 2153 states and 7377 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:55,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:55,182 INFO L93 Difference]: Finished difference Result 2848 states and 9544 transitions. [2021-07-09 18:39:55,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:39:55,183 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:39:55,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:55,188 INFO L225 Difference]: With dead ends: 2848 [2021-07-09 18:39:55,188 INFO L226 Difference]: Without dead ends: 2823 [2021-07-09 18:39:55,188 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1462.5ms TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:39:55,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2823 states. [2021-07-09 18:39:55,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2823 to 2129. [2021-07-09 18:39:55,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2129 states, 2128 states have (on average 3.425751879699248) internal successors, (7290), 2128 states have internal predecessors, (7290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:55,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2129 states to 2129 states and 7290 transitions. [2021-07-09 18:39:55,217 INFO L78 Accepts]: Start accepts. Automaton has 2129 states and 7290 transitions. Word has length 26 [2021-07-09 18:39:55,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:55,217 INFO L482 AbstractCegarLoop]: Abstraction has 2129 states and 7290 transitions. [2021-07-09 18:39:55,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:55,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2129 states and 7290 transitions. [2021-07-09 18:39:55,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:39:55,220 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:55,220 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:55,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3859 [2021-07-09 18:39:55,422 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:55,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:55,422 INFO L82 PathProgramCache]: Analyzing trace with hash 243784254, now seen corresponding path program 58 times [2021-07-09 18:39:55,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:55,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540652903] [2021-07-09 18:39:55,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:55,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:55,707 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-07-09 18:39:55,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:55,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:55,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540652903] [2021-07-09 18:39:55,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540652903] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:55,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271743328] [2021-07-09 18:39:55,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:55,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:39:55,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:55,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:39:55,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:56,143 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-07-09 18:39:56,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:56,269 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:56,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:39:56,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:56,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:56,280 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:39:56,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:39:56,281 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:56,405 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-07-09 18:39:56,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:56,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:56,418 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:56,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:39:56,420 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:56,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:56,429 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:56,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:39:56,430 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:56,546 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-07-09 18:39:56,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:56,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:56,559 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:39:56,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:39:56,560 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:56,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:56,569 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:56,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:39:56,573 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:56,676 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-07-09 18:39:56,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:56,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:56,687 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:56,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:39:56,690 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:56,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:56,699 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:39:56,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:39:56,700 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:56,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:56,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:39:56,798 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:341, output treesize:174 [2021-07-09 18:39:56,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:56,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271743328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:56,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:56,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:39:56,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463980772] [2021-07-09 18:39:56,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:39:56,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:56,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:39:56,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:39:56,974 INFO L87 Difference]: Start difference. First operand 2129 states and 7290 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:57,913 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-07-09 18:39:57,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:57,959 INFO L93 Difference]: Finished difference Result 2750 states and 9269 transitions. [2021-07-09 18:39:57,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:39:57,959 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:39:57,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:57,972 INFO L225 Difference]: With dead ends: 2750 [2021-07-09 18:39:57,972 INFO L226 Difference]: Without dead ends: 2735 [2021-07-09 18:39:57,973 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1380.8ms TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:39:57,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2735 states. [2021-07-09 18:39:57,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2735 to 2129. [2021-07-09 18:39:57,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2129 states, 2128 states have (on average 3.425751879699248) internal successors, (7290), 2128 states have internal predecessors, (7290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:57,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2129 states to 2129 states and 7290 transitions. [2021-07-09 18:39:57,999 INFO L78 Accepts]: Start accepts. Automaton has 2129 states and 7290 transitions. Word has length 26 [2021-07-09 18:39:57,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:57,999 INFO L482 AbstractCegarLoop]: Abstraction has 2129 states and 7290 transitions. [2021-07-09 18:39:57,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:57,999 INFO L276 IsEmpty]: Start isEmpty. Operand 2129 states and 7290 transitions. [2021-07-09 18:39:58,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:39:58,002 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:58,002 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:39:58,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3892 [2021-07-09 18:39:58,203 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:58,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:58,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1496131378, now seen corresponding path program 63 times [2021-07-09 18:39:58,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:58,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024937178] [2021-07-09 18:39:58,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:58,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:58,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:58,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:58,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024937178] [2021-07-09 18:39:58,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024937178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:58,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162796442] [2021-07-09 18:39:58,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:58,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:39:58,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:58,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:39:58,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:59,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:59,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:59,020 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-09 18:39:59,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:39:59,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:59,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:59,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:59,061 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 18:39:59,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-07-09 18:39:59,065 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:59,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:59,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:59,089 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-09 18:39:59,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 31 [2021-07-09 18:39:59,090 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:59,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:59,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:59,112 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-07-09 18:39:59,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-07-09 18:39:59,114 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:59,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:59,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:59,137 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-07-09 18:39:59,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 28 [2021-07-09 18:39:59,138 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:59,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:59,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:59,160 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-09 18:39:59,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 28 [2021-07-09 18:39:59,162 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:59,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:59,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:59,185 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:59,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-07-09 18:39:59,191 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:59,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:59,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:59,213 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:59,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-07-09 18:39:59,219 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:59,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:59,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:59,233 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:39:59,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-07-09 18:39:59,233 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:59,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:59,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:59,249 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:39:59,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 1 [2021-07-09 18:39:59,249 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:59,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:59,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:59,265 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:39:59,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-07-09 18:39:59,265 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:59,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:59,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:59,280 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:39:59,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-09 18:39:59,281 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:59,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:59,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:59,295 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:39:59,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-07-09 18:39:59,296 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:59,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:59,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:59,319 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 18:39:59,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-07-09 18:39:59,322 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:59,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:59,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:59,335 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:39:59,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-09 18:39:59,336 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:59,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:59,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:59,344 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:39:59,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-07-09 18:39:59,344 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:59,483 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 26 [2021-07-09 18:39:59,483 INFO L628 ElimStorePlain]: treesize reduction 140, result has 39.9 percent of original size [2021-07-09 18:39:59,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:39:59,486 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:83 [2021-07-09 18:39:59,579 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:59,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162796442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:59,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:59,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:39:59,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159986617] [2021-07-09 18:39:59,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:39:59,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:59,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:39:59,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:39:59,580 INFO L87 Difference]: Start difference. First operand 2129 states and 7290 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:01,855 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-07-09 18:40:02,132 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2021-07-09 18:40:02,326 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-07-09 18:40:02,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:02,424 INFO L93 Difference]: Finished difference Result 3313 states and 10903 transitions. [2021-07-09 18:40:02,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:40:02,425 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:40:02,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:02,430 INFO L225 Difference]: With dead ends: 3313 [2021-07-09 18:40:02,430 INFO L226 Difference]: Without dead ends: 3269 [2021-07-09 18:40:02,431 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 2739.4ms TimeCoverageRelationStatistics Valid=585, Invalid=2495, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:40:02,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3269 states. [2021-07-09 18:40:02,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3269 to 2147. [2021-07-09 18:40:02,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2147 states, 2146 states have (on average 3.4221808014911463) internal successors, (7344), 2146 states have internal predecessors, (7344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:02,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 7344 transitions. [2021-07-09 18:40:02,465 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 7344 transitions. Word has length 26 [2021-07-09 18:40:02,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:02,465 INFO L482 AbstractCegarLoop]: Abstraction has 2147 states and 7344 transitions. [2021-07-09 18:40:02,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:02,465 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 7344 transitions. [2021-07-09 18:40:02,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:02,468 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:02,468 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:02,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3925 [2021-07-09 18:40:02,668 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:02,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:02,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1868598568, now seen corresponding path program 59 times [2021-07-09 18:40:02,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:02,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699980293] [2021-07-09 18:40:02,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:02,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:02,706 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:02,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:02,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699980293] [2021-07-09 18:40:02,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699980293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:02,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002123390] [2021-07-09 18:40:02,706 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:02,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:40:02,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:02,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:02,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:02,832 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:02,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002123390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:02,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:02,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:40:02,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855406445] [2021-07-09 18:40:02,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:40:02,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:02,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:40:02,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:40:02,833 INFO L87 Difference]: Start difference. First operand 2147 states and 7344 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:03,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:03,764 INFO L93 Difference]: Finished difference Result 5131 states and 15966 transitions. [2021-07-09 18:40:03,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:40:03,764 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:03,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:03,773 INFO L225 Difference]: With dead ends: 5131 [2021-07-09 18:40:03,773 INFO L226 Difference]: Without dead ends: 5131 [2021-07-09 18:40:03,774 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 531.2ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:40:03,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5131 states. [2021-07-09 18:40:03,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5131 to 2340. [2021-07-09 18:40:03,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2340 states, 2339 states have (on average 3.469431380932022) internal successors, (8115), 2339 states have internal predecessors, (8115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:03,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2340 states to 2340 states and 8115 transitions. [2021-07-09 18:40:03,823 INFO L78 Accepts]: Start accepts. Automaton has 2340 states and 8115 transitions. Word has length 28 [2021-07-09 18:40:03,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:03,823 INFO L482 AbstractCegarLoop]: Abstraction has 2340 states and 8115 transitions. [2021-07-09 18:40:03,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:03,823 INFO L276 IsEmpty]: Start isEmpty. Operand 2340 states and 8115 transitions. [2021-07-09 18:40:03,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:03,826 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:03,826 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:04,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4056,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:04,027 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:04,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:04,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1450049884, now seen corresponding path program 60 times [2021-07-09 18:40:04,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:04,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77788817] [2021-07-09 18:40:04,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:04,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:04,065 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:04,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:04,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77788817] [2021-07-09 18:40:04,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77788817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:04,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076853077] [2021-07-09 18:40:04,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:04,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:40:04,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:04,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:04,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:04,189 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:04,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076853077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:04,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:04,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:40:04,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64387037] [2021-07-09 18:40:04,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:40:04,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:04,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:40:04,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:40:04,190 INFO L87 Difference]: Start difference. First operand 2340 states and 8115 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:05,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:05,344 INFO L93 Difference]: Finished difference Result 6763 states and 20717 transitions. [2021-07-09 18:40:05,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 18:40:05,344 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:05,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:05,356 INFO L225 Difference]: With dead ends: 6763 [2021-07-09 18:40:05,356 INFO L226 Difference]: Without dead ends: 6763 [2021-07-09 18:40:05,357 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 698.4ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-07-09 18:40:05,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6763 states. [2021-07-09 18:40:05,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 2351. [2021-07-09 18:40:05,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2351 states, 2350 states have (on average 3.4761702127659575) internal successors, (8169), 2350 states have internal predecessors, (8169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:05,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2351 states to 2351 states and 8169 transitions. [2021-07-09 18:40:05,417 INFO L78 Accepts]: Start accepts. Automaton has 2351 states and 8169 transitions. Word has length 28 [2021-07-09 18:40:05,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:05,418 INFO L482 AbstractCegarLoop]: Abstraction has 2351 states and 8169 transitions. [2021-07-09 18:40:05,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:05,418 INFO L276 IsEmpty]: Start isEmpty. Operand 2351 states and 8169 transitions. [2021-07-09 18:40:05,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:05,421 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:05,421 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:05,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4057 [2021-07-09 18:40:05,621 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:05,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:05,621 INFO L82 PathProgramCache]: Analyzing trace with hash 2017001964, now seen corresponding path program 61 times [2021-07-09 18:40:05,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:05,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434668407] [2021-07-09 18:40:05,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:05,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:05,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:05,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434668407] [2021-07-09 18:40:05,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434668407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:05,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226654762] [2021-07-09 18:40:05,665 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:05,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:05,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:05,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:05,785 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:05,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226654762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:05,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:05,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:40:05,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263667481] [2021-07-09 18:40:05,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:40:05,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:05,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:40:05,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:40:05,786 INFO L87 Difference]: Start difference. First operand 2351 states and 8169 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:06,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:06,912 INFO L93 Difference]: Finished difference Result 6150 states and 19231 transitions. [2021-07-09 18:40:06,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-09 18:40:06,912 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:06,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:06,923 INFO L225 Difference]: With dead ends: 6150 [2021-07-09 18:40:06,923 INFO L226 Difference]: Without dead ends: 6150 [2021-07-09 18:40:06,924 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 662.2ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-07-09 18:40:06,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6150 states. [2021-07-09 18:40:06,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6150 to 2299. [2021-07-09 18:40:06,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 2298 states have (on average 3.4538729329852047) internal successors, (7937), 2298 states have internal predecessors, (7937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:06,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 7937 transitions. [2021-07-09 18:40:06,979 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 7937 transitions. Word has length 28 [2021-07-09 18:40:06,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:06,979 INFO L482 AbstractCegarLoop]: Abstraction has 2299 states and 7937 transitions. [2021-07-09 18:40:06,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:06,979 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 7937 transitions. [2021-07-09 18:40:06,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:06,982 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:06,982 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:07,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4058,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:07,185 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:07,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:07,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1095937010, now seen corresponding path program 62 times [2021-07-09 18:40:07,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:07,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434271901] [2021-07-09 18:40:07,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:07,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:07,223 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:07,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:07,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434271901] [2021-07-09 18:40:07,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434271901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:07,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493750022] [2021-07-09 18:40:07,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:07,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:40:07,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:07,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:07,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:07,335 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:07,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493750022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:07,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:07,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:40:07,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328816596] [2021-07-09 18:40:07,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:40:07,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:07,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:40:07,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:40:07,337 INFO L87 Difference]: Start difference. First operand 2299 states and 7937 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:08,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:08,305 INFO L93 Difference]: Finished difference Result 5206 states and 16106 transitions. [2021-07-09 18:40:08,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 18:40:08,305 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:08,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:08,314 INFO L225 Difference]: With dead ends: 5206 [2021-07-09 18:40:08,314 INFO L226 Difference]: Without dead ends: 5206 [2021-07-09 18:40:08,315 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 604.4ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:40:08,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5206 states. [2021-07-09 18:40:08,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5206 to 2309. [2021-07-09 18:40:08,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2309 states, 2308 states have (on average 3.450173310225303) internal successors, (7963), 2308 states have internal predecessors, (7963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:08,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2309 states to 2309 states and 7963 transitions. [2021-07-09 18:40:08,362 INFO L78 Accepts]: Start accepts. Automaton has 2309 states and 7963 transitions. Word has length 28 [2021-07-09 18:40:08,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:08,362 INFO L482 AbstractCegarLoop]: Abstraction has 2309 states and 7963 transitions. [2021-07-09 18:40:08,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:08,362 INFO L276 IsEmpty]: Start isEmpty. Operand 2309 states and 7963 transitions. [2021-07-09 18:40:08,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:08,365 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:08,365 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:08,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4059,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:08,575 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:08,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:08,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1989400020, now seen corresponding path program 64 times [2021-07-09 18:40:08,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:08,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910141299] [2021-07-09 18:40:08,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:08,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:08,613 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:08,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:08,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910141299] [2021-07-09 18:40:08,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910141299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:08,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142387728] [2021-07-09 18:40:08,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:08,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:40:08,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:08,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:08,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:08,734 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:08,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142387728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:08,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:08,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 18:40:08,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090390007] [2021-07-09 18:40:08,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:40:08,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:08,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:40:08,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:40:08,735 INFO L87 Difference]: Start difference. First operand 2309 states and 7963 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:09,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:09,261 INFO L93 Difference]: Finished difference Result 4633 states and 14522 transitions. [2021-07-09 18:40:09,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:40:09,261 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:09,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:09,269 INFO L225 Difference]: With dead ends: 4633 [2021-07-09 18:40:09,269 INFO L226 Difference]: Without dead ends: 4633 [2021-07-09 18:40:09,269 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 304.9ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:40:09,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4633 states. [2021-07-09 18:40:09,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4633 to 2379. [2021-07-09 18:40:09,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2379 states, 2378 states have (on average 3.433978132884777) internal successors, (8166), 2378 states have internal predecessors, (8166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:09,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2379 states to 2379 states and 8166 transitions. [2021-07-09 18:40:09,310 INFO L78 Accepts]: Start accepts. Automaton has 2379 states and 8166 transitions. Word has length 28 [2021-07-09 18:40:09,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:09,311 INFO L482 AbstractCegarLoop]: Abstraction has 2379 states and 8166 transitions. [2021-07-09 18:40:09,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:09,311 INFO L276 IsEmpty]: Start isEmpty. Operand 2379 states and 8166 transitions. [2021-07-09 18:40:09,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:09,314 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:09,314 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:09,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4060,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:09,514 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:09,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:09,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1848031388, now seen corresponding path program 63 times [2021-07-09 18:40:09,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:09,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478146481] [2021-07-09 18:40:09,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:09,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:09,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:09,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:09,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478146481] [2021-07-09 18:40:09,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478146481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:09,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143415043] [2021-07-09 18:40:09,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:09,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:40:09,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:09,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:40:09,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:09,637 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:09,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143415043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:09,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:09,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:40:09,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071240006] [2021-07-09 18:40:09,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:40:09,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:09,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:40:09,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:40:09,637 INFO L87 Difference]: Start difference. First operand 2379 states and 8166 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:09,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:09,804 INFO L93 Difference]: Finished difference Result 3856 states and 12614 transitions. [2021-07-09 18:40:09,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:40:09,805 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:09,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:09,811 INFO L225 Difference]: With dead ends: 3856 [2021-07-09 18:40:09,811 INFO L226 Difference]: Without dead ends: 3832 [2021-07-09 18:40:09,811 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 100.7ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:40:09,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3832 states. [2021-07-09 18:40:09,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3832 to 2739. [2021-07-09 18:40:09,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2739 states, 2738 states have (on average 3.50036523009496) internal successors, (9584), 2738 states have internal predecessors, (9584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:09,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 9584 transitions. [2021-07-09 18:40:09,850 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 9584 transitions. Word has length 28 [2021-07-09 18:40:09,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:09,850 INFO L482 AbstractCegarLoop]: Abstraction has 2739 states and 9584 transitions. [2021-07-09 18:40:09,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:09,851 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 9584 transitions. [2021-07-09 18:40:09,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:09,854 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:09,854 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:10,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4061 [2021-07-09 18:40:10,054 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:10,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:10,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1411062680, now seen corresponding path program 64 times [2021-07-09 18:40:10,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:10,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344346928] [2021-07-09 18:40:10,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:10,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:10,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:10,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:10,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344346928] [2021-07-09 18:40:10,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344346928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:10,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124453533] [2021-07-09 18:40:10,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:10,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:40:10,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:10,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:40:10,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:10,193 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:10,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124453533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:10,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:10,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 18:40:10,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541523193] [2021-07-09 18:40:10,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:10,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:10,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:10,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:10,194 INFO L87 Difference]: Start difference. First operand 2739 states and 9584 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:10,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:10,741 INFO L93 Difference]: Finished difference Result 4478 states and 14368 transitions. [2021-07-09 18:40:10,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:40:10,742 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:10,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:10,749 INFO L225 Difference]: With dead ends: 4478 [2021-07-09 18:40:10,749 INFO L226 Difference]: Without dead ends: 4431 [2021-07-09 18:40:10,749 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 321.8ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:40:10,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4431 states. [2021-07-09 18:40:10,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4431 to 2904. [2021-07-09 18:40:10,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2904 states, 2903 states have (on average 3.5177402686875645) internal successors, (10212), 2903 states have internal predecessors, (10212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:10,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2904 states to 2904 states and 10212 transitions. [2021-07-09 18:40:10,796 INFO L78 Accepts]: Start accepts. Automaton has 2904 states and 10212 transitions. Word has length 28 [2021-07-09 18:40:10,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:10,796 INFO L482 AbstractCegarLoop]: Abstraction has 2904 states and 10212 transitions. [2021-07-09 18:40:10,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:10,796 INFO L276 IsEmpty]: Start isEmpty. Operand 2904 states and 10212 transitions. [2021-07-09 18:40:10,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:10,800 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:10,800 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:11,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4062 [2021-07-09 18:40:11,015 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:11,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:11,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1347815140, now seen corresponding path program 65 times [2021-07-09 18:40:11,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:11,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070138809] [2021-07-09 18:40:11,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:11,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:11,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:11,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:11,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070138809] [2021-07-09 18:40:11,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070138809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:11,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892819968] [2021-07-09 18:40:11,047 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:11,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:40:11,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:11,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:40:11,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:11,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:11,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892819968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:11,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:11,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:40:11,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226571966] [2021-07-09 18:40:11,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:40:11,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:11,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:40:11,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:40:11,156 INFO L87 Difference]: Start difference. First operand 2904 states and 10212 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:11,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:11,838 INFO L93 Difference]: Finished difference Result 4785 states and 15055 transitions. [2021-07-09 18:40:11,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:40:11,838 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:11,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:11,846 INFO L225 Difference]: With dead ends: 4785 [2021-07-09 18:40:11,846 INFO L226 Difference]: Without dead ends: 4759 [2021-07-09 18:40:11,846 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 398.1ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:40:11,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4759 states. [2021-07-09 18:40:11,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4759 to 2922. [2021-07-09 18:40:11,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2922 states, 2921 states have (on average 3.5217391304347827) internal successors, (10287), 2921 states have internal predecessors, (10287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:11,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2922 states to 2922 states and 10287 transitions. [2021-07-09 18:40:11,898 INFO L78 Accepts]: Start accepts. Automaton has 2922 states and 10287 transitions. Word has length 28 [2021-07-09 18:40:11,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:11,898 INFO L482 AbstractCegarLoop]: Abstraction has 2922 states and 10287 transitions. [2021-07-09 18:40:11,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:11,898 INFO L276 IsEmpty]: Start isEmpty. Operand 2922 states and 10287 transitions. [2021-07-09 18:40:11,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:11,902 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:11,902 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:12,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4063 [2021-07-09 18:40:12,109 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:12,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:12,109 INFO L82 PathProgramCache]: Analyzing trace with hash -675402358, now seen corresponding path program 66 times [2021-07-09 18:40:12,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:12,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608109940] [2021-07-09 18:40:12,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:12,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:12,139 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:12,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:12,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608109940] [2021-07-09 18:40:12,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608109940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:12,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964669102] [2021-07-09 18:40:12,140 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:12,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:40:12,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:12,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:40:12,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:12,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:12,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964669102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:12,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:12,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:40:12,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586399566] [2021-07-09 18:40:12,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:40:12,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:12,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:40:12,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:40:12,246 INFO L87 Difference]: Start difference. First operand 2922 states and 10287 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:12,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:12,850 INFO L93 Difference]: Finished difference Result 4783 states and 15074 transitions. [2021-07-09 18:40:12,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:40:12,850 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:12,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:12,858 INFO L225 Difference]: With dead ends: 4783 [2021-07-09 18:40:12,858 INFO L226 Difference]: Without dead ends: 4771 [2021-07-09 18:40:12,859 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 400.4ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:40:12,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4771 states. [2021-07-09 18:40:12,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4771 to 2922. [2021-07-09 18:40:12,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2922 states, 2921 states have (on average 3.515576857240671) internal successors, (10269), 2921 states have internal predecessors, (10269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:12,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2922 states to 2922 states and 10269 transitions. [2021-07-09 18:40:12,923 INFO L78 Accepts]: Start accepts. Automaton has 2922 states and 10269 transitions. Word has length 28 [2021-07-09 18:40:12,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:12,923 INFO L482 AbstractCegarLoop]: Abstraction has 2922 states and 10269 transitions. [2021-07-09 18:40:12,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:12,923 INFO L276 IsEmpty]: Start isEmpty. Operand 2922 states and 10269 transitions. [2021-07-09 18:40:12,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:12,927 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:12,927 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:13,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4064,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:13,127 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:13,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:13,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1724201280, now seen corresponding path program 67 times [2021-07-09 18:40:13,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:13,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123856807] [2021-07-09 18:40:13,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:13,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:13,159 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:13,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:13,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123856807] [2021-07-09 18:40:13,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123856807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:13,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038527333] [2021-07-09 18:40:13,159 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:13,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:13,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:40:13,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:13,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:13,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038527333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:13,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:13,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:40:13,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706346769] [2021-07-09 18:40:13,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:40:13,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:13,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:40:13,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:40:13,249 INFO L87 Difference]: Start difference. First operand 2922 states and 10269 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:13,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:13,753 INFO L93 Difference]: Finished difference Result 5554 states and 17878 transitions. [2021-07-09 18:40:13,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:40:13,753 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:13,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:13,762 INFO L225 Difference]: With dead ends: 5554 [2021-07-09 18:40:13,762 INFO L226 Difference]: Without dead ends: 5507 [2021-07-09 18:40:13,762 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 285.9ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:40:13,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5507 states. [2021-07-09 18:40:13,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5507 to 3068. [2021-07-09 18:40:13,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3068 states, 3067 states have (on average 3.5598304532116076) internal successors, (10918), 3067 states have internal predecessors, (10918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:13,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3068 states to 3068 states and 10918 transitions. [2021-07-09 18:40:13,825 INFO L78 Accepts]: Start accepts. Automaton has 3068 states and 10918 transitions. Word has length 28 [2021-07-09 18:40:13,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:13,825 INFO L482 AbstractCegarLoop]: Abstraction has 3068 states and 10918 transitions. [2021-07-09 18:40:13,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:13,825 INFO L276 IsEmpty]: Start isEmpty. Operand 3068 states and 10918 transitions. [2021-07-09 18:40:13,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:13,829 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:13,829 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:14,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4065 [2021-07-09 18:40:14,030 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:14,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:14,030 INFO L82 PathProgramCache]: Analyzing trace with hash 359577472, now seen corresponding path program 68 times [2021-07-09 18:40:14,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:14,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184728688] [2021-07-09 18:40:14,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:14,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:14,051 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:14,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:14,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184728688] [2021-07-09 18:40:14,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184728688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:14,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877706442] [2021-07-09 18:40:14,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:14,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:40:14,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:14,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:40:14,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:14,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:14,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877706442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:14,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:14,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 18:40:14,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801918064] [2021-07-09 18:40:14,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:40:14,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:14,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:40:14,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:40:14,131 INFO L87 Difference]: Start difference. First operand 3068 states and 10918 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:14,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:14,282 INFO L93 Difference]: Finished difference Result 4356 states and 14401 transitions. [2021-07-09 18:40:14,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:40:14,283 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:14,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:14,290 INFO L225 Difference]: With dead ends: 4356 [2021-07-09 18:40:14,290 INFO L226 Difference]: Without dead ends: 4356 [2021-07-09 18:40:14,290 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 101.1ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:40:14,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4356 states. [2021-07-09 18:40:14,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4356 to 2879. [2021-07-09 18:40:14,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2878 states have (on average 3.5295343988881167) internal successors, (10158), 2878 states have internal predecessors, (10158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:14,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 10158 transitions. [2021-07-09 18:40:14,334 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 10158 transitions. Word has length 28 [2021-07-09 18:40:14,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:14,335 INFO L482 AbstractCegarLoop]: Abstraction has 2879 states and 10158 transitions. [2021-07-09 18:40:14,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:14,335 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 10158 transitions. [2021-07-09 18:40:14,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:14,356 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:14,356 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:14,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4066 [2021-07-09 18:40:14,557 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:14,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:14,557 INFO L82 PathProgramCache]: Analyzing trace with hash -987104094, now seen corresponding path program 69 times [2021-07-09 18:40:14,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:14,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546442250] [2021-07-09 18:40:14,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:14,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:14,589 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:14,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:14,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546442250] [2021-07-09 18:40:14,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546442250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:14,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220329769] [2021-07-09 18:40:14,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:14,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:40:14,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:14,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:14,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:14,682 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:14,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220329769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:14,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:14,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:40:14,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101670682] [2021-07-09 18:40:14,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:40:14,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:14,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:40:14,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:40:14,683 INFO L87 Difference]: Start difference. First operand 2879 states and 10158 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:15,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:15,299 INFO L93 Difference]: Finished difference Result 6267 states and 19847 transitions. [2021-07-09 18:40:15,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:40:15,300 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:15,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:15,310 INFO L225 Difference]: With dead ends: 6267 [2021-07-09 18:40:15,310 INFO L226 Difference]: Without dead ends: 6267 [2021-07-09 18:40:15,310 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 349.1ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:40:15,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6267 states. [2021-07-09 18:40:15,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6267 to 2897. [2021-07-09 18:40:15,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2897 states, 2896 states have (on average 3.5293508287292816) internal successors, (10221), 2896 states have internal predecessors, (10221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:15,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2897 states to 2897 states and 10221 transitions. [2021-07-09 18:40:15,370 INFO L78 Accepts]: Start accepts. Automaton has 2897 states and 10221 transitions. Word has length 28 [2021-07-09 18:40:15,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:15,371 INFO L482 AbstractCegarLoop]: Abstraction has 2897 states and 10221 transitions. [2021-07-09 18:40:15,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:15,371 INFO L276 IsEmpty]: Start isEmpty. Operand 2897 states and 10221 transitions. [2021-07-09 18:40:15,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:15,374 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:15,374 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:15,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4067 [2021-07-09 18:40:15,575 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:15,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:15,575 INFO L82 PathProgramCache]: Analyzing trace with hash -202190000, now seen corresponding path program 70 times [2021-07-09 18:40:15,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:15,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899985382] [2021-07-09 18:40:15,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:15,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:15,609 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:15,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:15,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899985382] [2021-07-09 18:40:15,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899985382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:15,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941693042] [2021-07-09 18:40:15,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:15,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:40:15,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:15,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:15,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:15,701 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:15,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941693042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:15,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:15,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:40:15,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722348784] [2021-07-09 18:40:15,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:40:15,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:15,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:40:15,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:40:15,702 INFO L87 Difference]: Start difference. First operand 2897 states and 10221 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:16,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:16,373 INFO L93 Difference]: Finished difference Result 6510 states and 20600 transitions. [2021-07-09 18:40:16,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 18:40:16,374 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:16,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:16,384 INFO L225 Difference]: With dead ends: 6510 [2021-07-09 18:40:16,385 INFO L226 Difference]: Without dead ends: 6510 [2021-07-09 18:40:16,385 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 383.7ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:40:16,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6510 states. [2021-07-09 18:40:16,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6510 to 2991. [2021-07-09 18:40:16,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2991 states, 2990 states have (on average 3.5210702341137123) internal successors, (10528), 2990 states have internal predecessors, (10528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:16,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 10528 transitions. [2021-07-09 18:40:16,448 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 10528 transitions. Word has length 28 [2021-07-09 18:40:16,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:16,448 INFO L482 AbstractCegarLoop]: Abstraction has 2991 states and 10528 transitions. [2021-07-09 18:40:16,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:16,448 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 10528 transitions. [2021-07-09 18:40:16,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:16,452 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:16,452 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:16,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4068 [2021-07-09 18:40:16,653 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:16,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:16,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1285212656, now seen corresponding path program 71 times [2021-07-09 18:40:16,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:16,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611817160] [2021-07-09 18:40:16,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:16,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:16,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:16,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:16,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611817160] [2021-07-09 18:40:16,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611817160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:16,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021036443] [2021-07-09 18:40:16,684 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:16,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:40:16,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:16,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:40:16,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:16,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:16,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021036443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:16,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:16,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:40:16,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997111032] [2021-07-09 18:40:16,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:40:16,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:16,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:40:16,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:40:16,772 INFO L87 Difference]: Start difference. First operand 2991 states and 10528 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:17,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:17,332 INFO L93 Difference]: Finished difference Result 6652 states and 21097 transitions. [2021-07-09 18:40:17,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:40:17,332 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:17,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:17,344 INFO L225 Difference]: With dead ends: 6652 [2021-07-09 18:40:17,344 INFO L226 Difference]: Without dead ends: 6616 [2021-07-09 18:40:17,344 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 326.7ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:40:17,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6616 states. [2021-07-09 18:40:17,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6616 to 3393. [2021-07-09 18:40:17,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3393 states, 3392 states have (on average 3.5474646226415096) internal successors, (12033), 3392 states have internal predecessors, (12033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:17,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3393 states to 3393 states and 12033 transitions. [2021-07-09 18:40:17,419 INFO L78 Accepts]: Start accepts. Automaton has 3393 states and 12033 transitions. Word has length 28 [2021-07-09 18:40:17,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:17,419 INFO L482 AbstractCegarLoop]: Abstraction has 3393 states and 12033 transitions. [2021-07-09 18:40:17,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:17,419 INFO L276 IsEmpty]: Start isEmpty. Operand 3393 states and 12033 transitions. [2021-07-09 18:40:17,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:17,423 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:17,424 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:17,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4069,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:17,624 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:17,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:17,624 INFO L82 PathProgramCache]: Analyzing trace with hash 185865462, now seen corresponding path program 72 times [2021-07-09 18:40:17,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:17,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275869125] [2021-07-09 18:40:17,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:17,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:17,684 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:17,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:17,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275869125] [2021-07-09 18:40:17,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275869125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:17,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777417079] [2021-07-09 18:40:17,685 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:17,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:40:17,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:17,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:40:17,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:17,780 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:17,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777417079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:17,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:17,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:40:17,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509535346] [2021-07-09 18:40:17,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:40:17,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:17,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:40:17,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:40:17,781 INFO L87 Difference]: Start difference. First operand 3393 states and 12033 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:18,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:18,323 INFO L93 Difference]: Finished difference Result 6827 states and 21583 transitions. [2021-07-09 18:40:18,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:40:18,324 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:18,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:18,335 INFO L225 Difference]: With dead ends: 6827 [2021-07-09 18:40:18,335 INFO L226 Difference]: Without dead ends: 6827 [2021-07-09 18:40:18,336 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 354.0ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:40:18,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6827 states. [2021-07-09 18:40:18,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6827 to 3104. [2021-07-09 18:40:18,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3104 states, 3103 states have (on average 3.5078955849178213) internal successors, (10885), 3103 states have internal predecessors, (10885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:18,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3104 states to 3104 states and 10885 transitions. [2021-07-09 18:40:18,414 INFO L78 Accepts]: Start accepts. Automaton has 3104 states and 10885 transitions. Word has length 28 [2021-07-09 18:40:18,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:18,414 INFO L482 AbstractCegarLoop]: Abstraction has 3104 states and 10885 transitions. [2021-07-09 18:40:18,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:18,414 INFO L276 IsEmpty]: Start isEmpty. Operand 3104 states and 10885 transitions. [2021-07-09 18:40:18,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:18,418 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:18,418 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:18,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4070,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:18,619 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:18,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:18,619 INFO L82 PathProgramCache]: Analyzing trace with hash -247011142, now seen corresponding path program 73 times [2021-07-09 18:40:18,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:18,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47481251] [2021-07-09 18:40:18,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:18,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:18,652 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:18,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:18,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47481251] [2021-07-09 18:40:18,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47481251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:18,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151168750] [2021-07-09 18:40:18,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:18,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:18,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:18,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:18,738 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:18,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151168750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:18,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:18,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:40:18,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715496419] [2021-07-09 18:40:18,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:40:18,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:18,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:40:18,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:40:18,739 INFO L87 Difference]: Start difference. First operand 3104 states and 10885 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:19,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:19,351 INFO L93 Difference]: Finished difference Result 5999 states and 19332 transitions. [2021-07-09 18:40:19,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 18:40:19,351 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:19,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:19,362 INFO L225 Difference]: With dead ends: 5999 [2021-07-09 18:40:19,362 INFO L226 Difference]: Without dead ends: 5995 [2021-07-09 18:40:19,362 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 371.6ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:40:19,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5995 states. [2021-07-09 18:40:19,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5995 to 2864. [2021-07-09 18:40:19,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2864 states, 2863 states have (on average 3.5337059028990567) internal successors, (10117), 2863 states have internal predecessors, (10117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:19,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 10117 transitions. [2021-07-09 18:40:19,419 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 10117 transitions. Word has length 28 [2021-07-09 18:40:19,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:19,419 INFO L482 AbstractCegarLoop]: Abstraction has 2864 states and 10117 transitions. [2021-07-09 18:40:19,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:19,419 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 10117 transitions. [2021-07-09 18:40:19,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:19,423 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:19,423 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:19,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4071 [2021-07-09 18:40:19,623 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:19,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:19,624 INFO L82 PathProgramCache]: Analyzing trace with hash -519020332, now seen corresponding path program 74 times [2021-07-09 18:40:19,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:19,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861502507] [2021-07-09 18:40:19,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:19,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:19,663 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:19,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:19,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861502507] [2021-07-09 18:40:19,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861502507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:19,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359931935] [2021-07-09 18:40:19,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:40:19,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:40:19,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:19,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:19,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:19,776 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:19,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359931935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:19,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:19,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:40:19,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938388660] [2021-07-09 18:40:19,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:40:19,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:19,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:40:19,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:40:19,777 INFO L87 Difference]: Start difference. First operand 2864 states and 10117 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:20,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:20,750 INFO L93 Difference]: Finished difference Result 9242 states and 30126 transitions. [2021-07-09 18:40:20,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-09 18:40:20,750 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:20,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:20,768 INFO L225 Difference]: With dead ends: 9242 [2021-07-09 18:40:20,768 INFO L226 Difference]: Without dead ends: 9242 [2021-07-09 18:40:20,769 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 556.7ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:40:20,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9242 states. [2021-07-09 18:40:20,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9242 to 3043. [2021-07-09 18:40:20,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3043 states, 3042 states have (on average 3.6058514135437214) internal successors, (10969), 3042 states have internal predecessors, (10969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:20,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3043 states to 3043 states and 10969 transitions. [2021-07-09 18:40:20,864 INFO L78 Accepts]: Start accepts. Automaton has 3043 states and 10969 transitions. Word has length 28 [2021-07-09 18:40:20,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:20,865 INFO L482 AbstractCegarLoop]: Abstraction has 3043 states and 10969 transitions. [2021-07-09 18:40:20,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:20,865 INFO L276 IsEmpty]: Start isEmpty. Operand 3043 states and 10969 transitions. [2021-07-09 18:40:20,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:20,868 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:20,869 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:21,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4072,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:21,069 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:21,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:21,069 INFO L82 PathProgramCache]: Analyzing trace with hash 47931748, now seen corresponding path program 75 times [2021-07-09 18:40:21,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:21,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360138846] [2021-07-09 18:40:21,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:21,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:21,101 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:21,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:21,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360138846] [2021-07-09 18:40:21,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360138846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:21,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831767791] [2021-07-09 18:40:21,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:21,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:40:21,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:21,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:21,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:21,210 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:21,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831767791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:21,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:21,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:40:21,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639362704] [2021-07-09 18:40:21,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:40:21,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:21,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:40:21,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:40:21,211 INFO L87 Difference]: Start difference. First operand 3043 states and 10969 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:22,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:22,133 INFO L93 Difference]: Finished difference Result 9069 states and 29656 transitions. [2021-07-09 18:40:22,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-09 18:40:22,133 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:22,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:22,151 INFO L225 Difference]: With dead ends: 9069 [2021-07-09 18:40:22,151 INFO L226 Difference]: Without dead ends: 9069 [2021-07-09 18:40:22,151 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 540.3ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:40:22,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9069 states. [2021-07-09 18:40:22,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9069 to 3012. [2021-07-09 18:40:22,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3012 states, 3011 states have (on average 3.5888409166389903) internal successors, (10806), 3011 states have internal predecessors, (10806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:22,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3012 states to 3012 states and 10806 transitions. [2021-07-09 18:40:22,250 INFO L78 Accepts]: Start accepts. Automaton has 3012 states and 10806 transitions. Word has length 28 [2021-07-09 18:40:22,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:22,250 INFO L482 AbstractCegarLoop]: Abstraction has 3012 states and 10806 transitions. [2021-07-09 18:40:22,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:22,250 INFO L276 IsEmpty]: Start isEmpty. Operand 3012 states and 10806 transitions. [2021-07-09 18:40:22,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:22,254 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:22,254 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:22,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4073 [2021-07-09 18:40:22,454 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:22,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:22,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1124414110, now seen corresponding path program 76 times [2021-07-09 18:40:22,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:22,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797153241] [2021-07-09 18:40:22,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:22,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:22,492 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:22,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:22,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797153241] [2021-07-09 18:40:22,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797153241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:22,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329451026] [2021-07-09 18:40:22,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:22,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:40:22,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:22,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:22,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:22,592 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:22,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329451026] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:22,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:22,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 18:40:22,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833657637] [2021-07-09 18:40:22,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:22,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:22,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:22,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:22,593 INFO L87 Difference]: Start difference. First operand 3012 states and 10806 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:23,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:23,427 INFO L93 Difference]: Finished difference Result 8513 states and 26929 transitions. [2021-07-09 18:40:23,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-09 18:40:23,427 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:23,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:23,442 INFO L225 Difference]: With dead ends: 8513 [2021-07-09 18:40:23,443 INFO L226 Difference]: Without dead ends: 8513 [2021-07-09 18:40:23,443 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 460.4ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:40:23,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8513 states. [2021-07-09 18:40:23,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8513 to 3032. [2021-07-09 18:40:23,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3032 states, 3031 states have (on average 3.5922137908281093) internal successors, (10888), 3031 states have internal predecessors, (10888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:23,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3032 states to 3032 states and 10888 transitions. [2021-07-09 18:40:23,524 INFO L78 Accepts]: Start accepts. Automaton has 3032 states and 10888 transitions. Word has length 28 [2021-07-09 18:40:23,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:23,524 INFO L482 AbstractCegarLoop]: Abstraction has 3032 states and 10888 transitions. [2021-07-09 18:40:23,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:23,524 INFO L276 IsEmpty]: Start isEmpty. Operand 3032 states and 10888 transitions. [2021-07-09 18:40:23,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:23,528 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:23,528 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:23,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4074,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:23,728 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:23,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:23,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1043038022, now seen corresponding path program 77 times [2021-07-09 18:40:23,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:23,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940161989] [2021-07-09 18:40:23,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:23,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:23,776 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:23,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:23,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940161989] [2021-07-09 18:40:23,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940161989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:23,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840704200] [2021-07-09 18:40:23,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:23,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:40:23,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:23,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:23,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:23,871 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:23,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840704200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:23,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:23,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 18:40:23,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99968553] [2021-07-09 18:40:23,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:23,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:23,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:23,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:23,872 INFO L87 Difference]: Start difference. First operand 3032 states and 10888 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:24,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:24,652 INFO L93 Difference]: Finished difference Result 8020 states and 25736 transitions. [2021-07-09 18:40:24,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-09 18:40:24,652 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:24,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:24,667 INFO L225 Difference]: With dead ends: 8020 [2021-07-09 18:40:24,667 INFO L226 Difference]: Without dead ends: 8012 [2021-07-09 18:40:24,667 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 453.7ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:40:24,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8012 states. [2021-07-09 18:40:24,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8012 to 3014. [2021-07-09 18:40:24,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3014 states, 3013 states have (on average 3.5881181546631264) internal successors, (10811), 3013 states have internal predecessors, (10811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:24,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3014 states to 3014 states and 10811 transitions. [2021-07-09 18:40:24,743 INFO L78 Accepts]: Start accepts. Automaton has 3014 states and 10811 transitions. Word has length 28 [2021-07-09 18:40:24,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:24,743 INFO L482 AbstractCegarLoop]: Abstraction has 3014 states and 10811 transitions. [2021-07-09 18:40:24,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:24,744 INFO L276 IsEmpty]: Start isEmpty. Operand 3014 states and 10811 transitions. [2021-07-09 18:40:24,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:24,747 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:24,747 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:24,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4075 [2021-07-09 18:40:24,948 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:24,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:24,948 INFO L82 PathProgramCache]: Analyzing trace with hash -112380806, now seen corresponding path program 78 times [2021-07-09 18:40:24,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:24,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936367741] [2021-07-09 18:40:24,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:24,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:24,980 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:24,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:24,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936367741] [2021-07-09 18:40:24,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936367741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:24,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680172597] [2021-07-09 18:40:24,980 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:25,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:40:25,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:25,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:25,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:25,089 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:25,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680172597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:25,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:25,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:40:25,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439596680] [2021-07-09 18:40:25,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:40:25,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:25,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:40:25,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:40:25,090 INFO L87 Difference]: Start difference. First operand 3014 states and 10811 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:25,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:25,984 INFO L93 Difference]: Finished difference Result 7945 states and 25505 transitions. [2021-07-09 18:40:25,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-09 18:40:25,985 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:25,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:25,999 INFO L225 Difference]: With dead ends: 7945 [2021-07-09 18:40:25,999 INFO L226 Difference]: Without dead ends: 7945 [2021-07-09 18:40:26,000 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 496.4ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:40:26,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7945 states. [2021-07-09 18:40:26,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7945 to 3030. [2021-07-09 18:40:26,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3030 states, 3029 states have (on average 3.5902938263453286) internal successors, (10875), 3029 states have internal predecessors, (10875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:26,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3030 states to 3030 states and 10875 transitions. [2021-07-09 18:40:26,074 INFO L78 Accepts]: Start accepts. Automaton has 3030 states and 10875 transitions. Word has length 28 [2021-07-09 18:40:26,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:26,074 INFO L482 AbstractCegarLoop]: Abstraction has 3030 states and 10875 transitions. [2021-07-09 18:40:26,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:26,074 INFO L276 IsEmpty]: Start isEmpty. Operand 3030 states and 10875 transitions. [2021-07-09 18:40:26,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:26,078 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:26,078 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:26,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4076 [2021-07-09 18:40:26,278 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:26,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:26,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1530658348, now seen corresponding path program 79 times [2021-07-09 18:40:26,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:26,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88656605] [2021-07-09 18:40:26,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:26,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:26,316 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:26,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:26,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88656605] [2021-07-09 18:40:26,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88656605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:26,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322746717] [2021-07-09 18:40:26,316 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:26,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:26,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:26,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:26,418 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:26,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322746717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:26,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:26,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:40:26,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650055971] [2021-07-09 18:40:26,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:40:26,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:26,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:40:26,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:40:26,418 INFO L87 Difference]: Start difference. First operand 3030 states and 10875 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:27,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:27,318 INFO L93 Difference]: Finished difference Result 7613 states and 24721 transitions. [2021-07-09 18:40:27,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 18:40:27,318 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:27,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:27,335 INFO L225 Difference]: With dead ends: 7613 [2021-07-09 18:40:27,335 INFO L226 Difference]: Without dead ends: 7605 [2021-07-09 18:40:27,335 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 466.0ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:40:27,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7605 states. [2021-07-09 18:40:27,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7605 to 2787. [2021-07-09 18:40:27,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2787 states, 2786 states have (on average 3.5078966259870783) internal successors, (9773), 2786 states have internal predecessors, (9773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:27,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 9773 transitions. [2021-07-09 18:40:27,405 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 9773 transitions. Word has length 28 [2021-07-09 18:40:27,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:27,405 INFO L482 AbstractCegarLoop]: Abstraction has 2787 states and 9773 transitions. [2021-07-09 18:40:27,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:27,405 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 9773 transitions. [2021-07-09 18:40:27,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:27,409 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:27,409 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:27,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4077 [2021-07-09 18:40:27,613 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:27,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:27,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1614061928, now seen corresponding path program 80 times [2021-07-09 18:40:27,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:27,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487154539] [2021-07-09 18:40:27,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:27,645 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:27,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:27,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487154539] [2021-07-09 18:40:27,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487154539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:27,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668354018] [2021-07-09 18:40:27,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:27,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:40:27,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:27,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:27,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:27,755 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:27,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668354018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:27,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:27,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 18:40:27,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546729317] [2021-07-09 18:40:27,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:40:27,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:27,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:40:27,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:40:27,756 INFO L87 Difference]: Start difference. First operand 2787 states and 9773 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:28,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:28,568 INFO L93 Difference]: Finished difference Result 5810 states and 18592 transitions. [2021-07-09 18:40:28,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 18:40:28,568 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:28,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:28,578 INFO L225 Difference]: With dead ends: 5810 [2021-07-09 18:40:28,578 INFO L226 Difference]: Without dead ends: 5810 [2021-07-09 18:40:28,579 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 478.4ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:40:28,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5810 states. [2021-07-09 18:40:28,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5810 to 2799. [2021-07-09 18:40:28,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2799 states, 2798 states have (on average 3.506433166547534) internal successors, (9811), 2798 states have internal predecessors, (9811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:28,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2799 states to 2799 states and 9811 transitions. [2021-07-09 18:40:28,631 INFO L78 Accepts]: Start accepts. Automaton has 2799 states and 9811 transitions. Word has length 28 [2021-07-09 18:40:28,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:28,631 INFO L482 AbstractCegarLoop]: Abstraction has 2799 states and 9811 transitions. [2021-07-09 18:40:28,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:28,631 INFO L276 IsEmpty]: Start isEmpty. Operand 2799 states and 9811 transitions. [2021-07-09 18:40:28,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:28,634 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:28,634 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:28,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4078 [2021-07-09 18:40:28,835 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:28,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:28,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1027545192, now seen corresponding path program 81 times [2021-07-09 18:40:28,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:28,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574592717] [2021-07-09 18:40:28,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:28,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:28,868 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:28,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:28,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574592717] [2021-07-09 18:40:28,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574592717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:28,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916202449] [2021-07-09 18:40:28,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:28,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:40:28,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:28,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:28,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:28,994 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:28,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916202449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:28,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:28,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:40:28,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417059421] [2021-07-09 18:40:28,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:40:28,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:28,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:40:28,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:40:28,995 INFO L87 Difference]: Start difference. First operand 2799 states and 9811 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:29,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:29,957 INFO L93 Difference]: Finished difference Result 6586 states and 20579 transitions. [2021-07-09 18:40:29,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-09 18:40:29,957 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:29,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:29,970 INFO L225 Difference]: With dead ends: 6586 [2021-07-09 18:40:29,971 INFO L226 Difference]: Without dead ends: 6586 [2021-07-09 18:40:29,971 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 628.1ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 18:40:29,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6586 states. [2021-07-09 18:40:30,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6586 to 2865. [2021-07-09 18:40:30,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2865 states, 2864 states have (on average 3.5013966480446927) internal successors, (10028), 2864 states have internal predecessors, (10028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:30,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 10028 transitions. [2021-07-09 18:40:30,061 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 10028 transitions. Word has length 28 [2021-07-09 18:40:30,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:30,062 INFO L482 AbstractCegarLoop]: Abstraction has 2865 states and 10028 transitions. [2021-07-09 18:40:30,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:30,062 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 10028 transitions. [2021-07-09 18:40:30,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:30,065 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:30,065 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:30,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4079 [2021-07-09 18:40:30,266 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:30,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:30,266 INFO L82 PathProgramCache]: Analyzing trace with hash 615493962, now seen corresponding path program 82 times [2021-07-09 18:40:30,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:30,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175263101] [2021-07-09 18:40:30,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:30,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:30,314 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:30,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:30,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175263101] [2021-07-09 18:40:30,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175263101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:30,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771791639] [2021-07-09 18:40:30,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:40:30,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:40:30,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:30,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:30,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:30,442 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:30,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771791639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:30,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:30,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:40:30,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915017751] [2021-07-09 18:40:30,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:40:30,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:30,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:40:30,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:40:30,442 INFO L87 Difference]: Start difference. First operand 2865 states and 10028 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:31,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:31,357 INFO L93 Difference]: Finished difference Result 6152 states and 19441 transitions. [2021-07-09 18:40:31,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 18:40:31,357 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:31,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:31,369 INFO L225 Difference]: With dead ends: 6152 [2021-07-09 18:40:31,369 INFO L226 Difference]: Without dead ends: 6148 [2021-07-09 18:40:31,370 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 571.7ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:40:31,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6148 states. [2021-07-09 18:40:31,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6148 to 2791. [2021-07-09 18:40:31,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2790 states have (on average 3.4974910394265235) internal successors, (9758), 2790 states have internal predecessors, (9758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:31,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 9758 transitions. [2021-07-09 18:40:31,434 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 9758 transitions. Word has length 28 [2021-07-09 18:40:31,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:31,434 INFO L482 AbstractCegarLoop]: Abstraction has 2791 states and 9758 transitions. [2021-07-09 18:40:31,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:31,434 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 9758 transitions. [2021-07-09 18:40:31,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:31,438 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:31,438 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:31,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4080,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:31,638 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:31,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:31,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1194937186, now seen corresponding path program 65 times [2021-07-09 18:40:31,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:31,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667025424] [2021-07-09 18:40:31,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:31,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:31,679 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:31,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:31,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667025424] [2021-07-09 18:40:31,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667025424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:31,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950074197] [2021-07-09 18:40:31,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:31,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:40:31,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:31,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:31,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:31,793 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:31,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950074197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:31,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:31,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:40:31,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865753124] [2021-07-09 18:40:31,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:31,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:31,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:31,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:31,793 INFO L87 Difference]: Start difference. First operand 2791 states and 9758 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:32,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:32,354 INFO L93 Difference]: Finished difference Result 5291 states and 17008 transitions. [2021-07-09 18:40:32,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:40:32,354 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:32,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:32,366 INFO L225 Difference]: With dead ends: 5291 [2021-07-09 18:40:32,366 INFO L226 Difference]: Without dead ends: 5291 [2021-07-09 18:40:32,366 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 305.4ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:40:32,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5291 states. [2021-07-09 18:40:32,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5291 to 2791. [2021-07-09 18:40:32,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2790 states have (on average 3.499641577060932) internal successors, (9764), 2790 states have internal predecessors, (9764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:32,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 9764 transitions. [2021-07-09 18:40:32,417 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 9764 transitions. Word has length 28 [2021-07-09 18:40:32,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:32,417 INFO L482 AbstractCegarLoop]: Abstraction has 2791 states and 9764 transitions. [2021-07-09 18:40:32,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:32,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 9764 transitions. [2021-07-09 18:40:32,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:32,421 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:32,421 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:32,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4081,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:32,621 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:32,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:32,622 INFO L82 PathProgramCache]: Analyzing trace with hash -416862576, now seen corresponding path program 66 times [2021-07-09 18:40:32,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:32,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112923133] [2021-07-09 18:40:32,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:32,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:32,659 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:32,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:32,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112923133] [2021-07-09 18:40:32,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112923133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:32,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497272843] [2021-07-09 18:40:32,659 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:32,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:40:32,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:32,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:32,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:32,754 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:32,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497272843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:32,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:32,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:40:32,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380386404] [2021-07-09 18:40:32,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:32,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:32,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:32,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:32,755 INFO L87 Difference]: Start difference. First operand 2791 states and 9764 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:33,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:33,466 INFO L93 Difference]: Finished difference Result 5642 states and 18000 transitions. [2021-07-09 18:40:33,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:40:33,466 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:33,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:33,477 INFO L225 Difference]: With dead ends: 5642 [2021-07-09 18:40:33,477 INFO L226 Difference]: Without dead ends: 5642 [2021-07-09 18:40:33,477 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 410.7ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:40:33,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5642 states. [2021-07-09 18:40:33,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5642 to 2782. [2021-07-09 18:40:33,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2782 states, 2781 states have (on average 3.4998202085580727) internal successors, (9733), 2781 states have internal predecessors, (9733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:33,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2782 states to 2782 states and 9733 transitions. [2021-07-09 18:40:33,538 INFO L78 Accepts]: Start accepts. Automaton has 2782 states and 9733 transitions. Word has length 28 [2021-07-09 18:40:33,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:33,538 INFO L482 AbstractCegarLoop]: Abstraction has 2782 states and 9733 transitions. [2021-07-09 18:40:33,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:33,538 INFO L276 IsEmpty]: Start isEmpty. Operand 2782 states and 9733 transitions. [2021-07-09 18:40:33,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:33,542 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:33,542 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:33,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4082,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:33,749 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:33,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:33,749 INFO L82 PathProgramCache]: Analyzing trace with hash -648402224, now seen corresponding path program 67 times [2021-07-09 18:40:33,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:33,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086003961] [2021-07-09 18:40:33,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:33,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:33,786 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:33,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:33,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086003961] [2021-07-09 18:40:33,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086003961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:33,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134549335] [2021-07-09 18:40:33,787 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:33,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:33,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:33,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:33,881 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:33,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134549335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:33,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:33,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:40:33,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499494466] [2021-07-09 18:40:33,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:33,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:33,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:33,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:33,882 INFO L87 Difference]: Start difference. First operand 2782 states and 9733 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:34,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:34,678 INFO L93 Difference]: Finished difference Result 6106 states and 19261 transitions. [2021-07-09 18:40:34,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-09 18:40:34,678 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:34,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:34,691 INFO L225 Difference]: With dead ends: 6106 [2021-07-09 18:40:34,691 INFO L226 Difference]: Without dead ends: 6106 [2021-07-09 18:40:34,692 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 467.7ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:40:34,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6106 states. [2021-07-09 18:40:34,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6106 to 2844. [2021-07-09 18:40:34,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2844 states, 2843 states have (on average 3.4956032360182907) internal successors, (9938), 2843 states have internal predecessors, (9938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:34,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2844 states to 2844 states and 9938 transitions. [2021-07-09 18:40:34,767 INFO L78 Accepts]: Start accepts. Automaton has 2844 states and 9938 transitions. Word has length 28 [2021-07-09 18:40:34,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:34,767 INFO L482 AbstractCegarLoop]: Abstraction has 2844 states and 9938 transitions. [2021-07-09 18:40:34,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:34,767 INFO L276 IsEmpty]: Start isEmpty. Operand 2844 states and 9938 transitions. [2021-07-09 18:40:34,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:34,771 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:34,771 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:34,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4083 [2021-07-09 18:40:34,980 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:34,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:34,980 INFO L82 PathProgramCache]: Analyzing trace with hash -628686410, now seen corresponding path program 68 times [2021-07-09 18:40:34,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:34,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809641370] [2021-07-09 18:40:34,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:34,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:35,012 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:35,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:35,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809641370] [2021-07-09 18:40:35,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809641370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:35,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545167995] [2021-07-09 18:40:35,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:35,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:40:35,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:35,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:35,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:35,140 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:35,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545167995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:35,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:35,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-09 18:40:35,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634587297] [2021-07-09 18:40:35,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:40:35,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:35,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:40:35,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:40:35,141 INFO L87 Difference]: Start difference. First operand 2844 states and 9938 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:35,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:35,673 INFO L93 Difference]: Finished difference Result 6899 states and 23235 transitions. [2021-07-09 18:40:35,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:40:35,673 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:35,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:35,687 INFO L225 Difference]: With dead ends: 6899 [2021-07-09 18:40:35,687 INFO L226 Difference]: Without dead ends: 6899 [2021-07-09 18:40:35,687 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 349.1ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:40:35,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6899 states. [2021-07-09 18:40:35,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6899 to 4080. [2021-07-09 18:40:35,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4080 states, 4079 states have (on average 3.613875949987742) internal successors, (14741), 4079 states have internal predecessors, (14741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:35,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4080 states to 4080 states and 14741 transitions. [2021-07-09 18:40:35,776 INFO L78 Accepts]: Start accepts. Automaton has 4080 states and 14741 transitions. Word has length 28 [2021-07-09 18:40:35,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:35,776 INFO L482 AbstractCegarLoop]: Abstraction has 4080 states and 14741 transitions. [2021-07-09 18:40:35,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:35,777 INFO L276 IsEmpty]: Start isEmpty. Operand 4080 states and 14741 transitions. [2021-07-09 18:40:35,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:35,782 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:35,783 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:35,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4084 [2021-07-09 18:40:35,983 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:35,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:35,983 INFO L82 PathProgramCache]: Analyzing trace with hash -693223366, now seen corresponding path program 69 times [2021-07-09 18:40:35,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:35,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582025260] [2021-07-09 18:40:35,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:35,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:36,020 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:36,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:36,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582025260] [2021-07-09 18:40:36,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582025260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:36,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96271301] [2021-07-09 18:40:36,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:36,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:40:36,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:36,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:36,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:36,110 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:36,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96271301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:36,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:36,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:40:36,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401969826] [2021-07-09 18:40:36,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:36,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:36,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:36,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:36,110 INFO L87 Difference]: Start difference. First operand 4080 states and 14741 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:36,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:36,834 INFO L93 Difference]: Finished difference Result 7418 states and 25100 transitions. [2021-07-09 18:40:36,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 18:40:36,834 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:36,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:36,849 INFO L225 Difference]: With dead ends: 7418 [2021-07-09 18:40:36,849 INFO L226 Difference]: Without dead ends: 7414 [2021-07-09 18:40:36,849 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 430.2ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:40:36,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7414 states. [2021-07-09 18:40:36,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7414 to 3968. [2021-07-09 18:40:36,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3968 states, 3967 states have (on average 3.623140912528359) internal successors, (14373), 3967 states have internal predecessors, (14373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:36,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3968 states to 3968 states and 14373 transitions. [2021-07-09 18:40:36,938 INFO L78 Accepts]: Start accepts. Automaton has 3968 states and 14373 transitions. Word has length 28 [2021-07-09 18:40:36,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:36,938 INFO L482 AbstractCegarLoop]: Abstraction has 3968 states and 14373 transitions. [2021-07-09 18:40:36,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:36,939 INFO L276 IsEmpty]: Start isEmpty. Operand 3968 states and 14373 transitions. [2021-07-09 18:40:36,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:36,944 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:36,944 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:37,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4085 [2021-07-09 18:40:37,145 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:37,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:37,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1327034102, now seen corresponding path program 83 times [2021-07-09 18:40:37,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:37,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694418505] [2021-07-09 18:40:37,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:37,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:37,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:37,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:37,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694418505] [2021-07-09 18:40:37,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694418505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:37,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120277004] [2021-07-09 18:40:37,171 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:37,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:40:37,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:37,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:40:37,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:37,272 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:37,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120277004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:37,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:37,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 18:40:37,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10257539] [2021-07-09 18:40:37,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:37,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:37,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:37,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:37,273 INFO L87 Difference]: Start difference. First operand 3968 states and 14373 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:38,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:38,017 INFO L93 Difference]: Finished difference Result 8219 states and 27545 transitions. [2021-07-09 18:40:38,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:40:38,018 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:38,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:38,033 INFO L225 Difference]: With dead ends: 8219 [2021-07-09 18:40:38,034 INFO L226 Difference]: Without dead ends: 8207 [2021-07-09 18:40:38,034 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 432.3ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:40:38,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8207 states. [2021-07-09 18:40:38,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8207 to 4409. [2021-07-09 18:40:38,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4409 states, 4408 states have (on average 3.713475499092559) internal successors, (16369), 4408 states have internal predecessors, (16369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:38,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4409 states to 4409 states and 16369 transitions. [2021-07-09 18:40:38,149 INFO L78 Accepts]: Start accepts. Automaton has 4409 states and 16369 transitions. Word has length 28 [2021-07-09 18:40:38,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:38,149 INFO L482 AbstractCegarLoop]: Abstraction has 4409 states and 16369 transitions. [2021-07-09 18:40:38,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:38,149 INFO L276 IsEmpty]: Start isEmpty. Operand 4409 states and 16369 transitions. [2021-07-09 18:40:38,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:38,155 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:38,156 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:38,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4086 [2021-07-09 18:40:38,356 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:38,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:38,356 INFO L82 PathProgramCache]: Analyzing trace with hash -926591794, now seen corresponding path program 84 times [2021-07-09 18:40:38,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:38,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78962582] [2021-07-09 18:40:38,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:38,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:38,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:38,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:38,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78962582] [2021-07-09 18:40:38,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78962582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:38,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631591566] [2021-07-09 18:40:38,382 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:38,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:40:38,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:38,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:40:38,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:38,483 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:38,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631591566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:38,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:38,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 18:40:38,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570491492] [2021-07-09 18:40:38,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:38,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:38,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:38,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:38,484 INFO L87 Difference]: Start difference. First operand 4409 states and 16369 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:39,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:39,235 INFO L93 Difference]: Finished difference Result 8511 states and 28462 transitions. [2021-07-09 18:40:39,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:40:39,235 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:39,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:39,252 INFO L225 Difference]: With dead ends: 8511 [2021-07-09 18:40:39,252 INFO L226 Difference]: Without dead ends: 8511 [2021-07-09 18:40:39,252 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 436.6ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:40:39,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8511 states. [2021-07-09 18:40:39,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8511 to 4429. [2021-07-09 18:40:39,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4429 states, 4428 states have (on average 3.7007678410117433) internal successors, (16387), 4428 states have internal predecessors, (16387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:39,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4429 states to 4429 states and 16387 transitions. [2021-07-09 18:40:39,390 INFO L78 Accepts]: Start accepts. Automaton has 4429 states and 16387 transitions. Word has length 28 [2021-07-09 18:40:39,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:39,391 INFO L482 AbstractCegarLoop]: Abstraction has 4429 states and 16387 transitions. [2021-07-09 18:40:39,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:39,391 INFO L276 IsEmpty]: Start isEmpty. Operand 4429 states and 16387 transitions. [2021-07-09 18:40:39,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:39,397 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:39,397 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:39,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4087,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:39,598 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:39,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:39,598 INFO L82 PathProgramCache]: Analyzing trace with hash -2129998084, now seen corresponding path program 85 times [2021-07-09 18:40:39,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:39,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039749545] [2021-07-09 18:40:39,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:39,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:39,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:39,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:39,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039749545] [2021-07-09 18:40:39,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039749545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:39,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501917253] [2021-07-09 18:40:39,629 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:39,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:39,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:40:39,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:39,706 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:39,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501917253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:39,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:39,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:40:39,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986564074] [2021-07-09 18:40:39,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:40:39,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:39,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:40:39,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:40:39,706 INFO L87 Difference]: Start difference. First operand 4429 states and 16387 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:40,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:40,093 INFO L93 Difference]: Finished difference Result 7882 states and 27809 transitions. [2021-07-09 18:40:40,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:40:40,093 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:40,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:40,109 INFO L225 Difference]: With dead ends: 7882 [2021-07-09 18:40:40,109 INFO L226 Difference]: Without dead ends: 7799 [2021-07-09 18:40:40,109 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 212.7ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:40:40,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7799 states. [2021-07-09 18:40:40,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7799 to 5872. [2021-07-09 18:40:40,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5872 states, 5871 states have (on average 3.7629024016351558) internal successors, (22092), 5871 states have internal predecessors, (22092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:40,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5872 states to 5872 states and 22092 transitions. [2021-07-09 18:40:40,227 INFO L78 Accepts]: Start accepts. Automaton has 5872 states and 22092 transitions. Word has length 28 [2021-07-09 18:40:40,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:40,227 INFO L482 AbstractCegarLoop]: Abstraction has 5872 states and 22092 transitions. [2021-07-09 18:40:40,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:40,227 INFO L276 IsEmpty]: Start isEmpty. Operand 5872 states and 22092 transitions. [2021-07-09 18:40:40,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:40,237 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:40,237 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:40,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4088 [2021-07-09 18:40:40,449 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:40,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:40,449 INFO L82 PathProgramCache]: Analyzing trace with hash -921983104, now seen corresponding path program 86 times [2021-07-09 18:40:40,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:40,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257164852] [2021-07-09 18:40:40,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:40,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:40,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:40,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:40,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257164852] [2021-07-09 18:40:40,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257164852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:40,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941468497] [2021-07-09 18:40:40,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:40,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:40:40,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:40,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:40:40,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:40,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:40,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941468497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:40,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:40,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-07-09 18:40:40,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009339743] [2021-07-09 18:40:40,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:40:40,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:40,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:40:40,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:40:40,558 INFO L87 Difference]: Start difference. First operand 5872 states and 22092 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:40,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:40,723 INFO L93 Difference]: Finished difference Result 8160 states and 28714 transitions. [2021-07-09 18:40:40,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:40:40,724 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:40,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:40,741 INFO L225 Difference]: With dead ends: 8160 [2021-07-09 18:40:40,741 INFO L226 Difference]: Without dead ends: 8160 [2021-07-09 18:40:40,741 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 104.6ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:40:40,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8160 states. [2021-07-09 18:40:40,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8160 to 6012. [2021-07-09 18:40:40,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6012 states, 6011 states have (on average 3.7394776243553487) internal successors, (22478), 6011 states have internal predecessors, (22478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:40,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6012 states to 6012 states and 22478 transitions. [2021-07-09 18:40:40,880 INFO L78 Accepts]: Start accepts. Automaton has 6012 states and 22478 transitions. Word has length 28 [2021-07-09 18:40:40,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:40,880 INFO L482 AbstractCegarLoop]: Abstraction has 6012 states and 22478 transitions. [2021-07-09 18:40:40,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:40,881 INFO L276 IsEmpty]: Start isEmpty. Operand 6012 states and 22478 transitions. [2021-07-09 18:40:40,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:40,890 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:40,890 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:41,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4089,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:41,091 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:41,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:41,091 INFO L82 PathProgramCache]: Analyzing trace with hash 8216640, now seen corresponding path program 87 times [2021-07-09 18:40:41,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:41,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654508413] [2021-07-09 18:40:41,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:41,128 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:41,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:41,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654508413] [2021-07-09 18:40:41,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654508413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:41,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150016806] [2021-07-09 18:40:41,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:41,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:40:41,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:41,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:41,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:41,211 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:41,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150016806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:41,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:41,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-09 18:40:41,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734800538] [2021-07-09 18:40:41,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:40:41,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:41,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:40:41,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:40:41,212 INFO L87 Difference]: Start difference. First operand 6012 states and 22478 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:41,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:41,909 INFO L93 Difference]: Finished difference Result 12545 states and 43647 transitions. [2021-07-09 18:40:41,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 18:40:41,910 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:41,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:41,938 INFO L225 Difference]: With dead ends: 12545 [2021-07-09 18:40:41,939 INFO L226 Difference]: Without dead ends: 12545 [2021-07-09 18:40:41,939 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 389.5ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:40:41,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12545 states. [2021-07-09 18:40:42,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12545 to 6665. [2021-07-09 18:40:42,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6665 states, 6664 states have (on average 3.7554021608643455) internal successors, (25026), 6664 states have internal predecessors, (25026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:42,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6665 states to 6665 states and 25026 transitions. [2021-07-09 18:40:42,152 INFO L78 Accepts]: Start accepts. Automaton has 6665 states and 25026 transitions. Word has length 28 [2021-07-09 18:40:42,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:42,152 INFO L482 AbstractCegarLoop]: Abstraction has 6665 states and 25026 transitions. [2021-07-09 18:40:42,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:42,152 INFO L276 IsEmpty]: Start isEmpty. Operand 6665 states and 25026 transitions. [2021-07-09 18:40:42,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:42,164 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:42,164 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:42,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4090,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:42,364 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:42,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:42,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1910896092, now seen corresponding path program 88 times [2021-07-09 18:40:42,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:42,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320726739] [2021-07-09 18:40:42,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:42,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:42,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:42,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320726739] [2021-07-09 18:40:42,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320726739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:42,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829549107] [2021-07-09 18:40:42,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:42,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:40:42,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:42,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:42,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:42,486 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:42,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829549107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:42,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:42,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-07-09 18:40:42,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432394153] [2021-07-09 18:40:42,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:40:42,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:42,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:40:42,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:40:42,487 INFO L87 Difference]: Start difference. First operand 6665 states and 25026 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:43,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:43,112 INFO L93 Difference]: Finished difference Result 12678 states and 44148 transitions. [2021-07-09 18:40:43,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:40:43,112 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:43,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:43,142 INFO L225 Difference]: With dead ends: 12678 [2021-07-09 18:40:43,142 INFO L226 Difference]: Without dead ends: 12678 [2021-07-09 18:40:43,142 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 342.4ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:40:43,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12678 states. [2021-07-09 18:40:43,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12678 to 6895. [2021-07-09 18:40:43,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6895 states, 6894 states have (on average 3.7358572671888597) internal successors, (25755), 6894 states have internal predecessors, (25755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:43,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6895 states to 6895 states and 25755 transitions. [2021-07-09 18:40:43,321 INFO L78 Accepts]: Start accepts. Automaton has 6895 states and 25755 transitions. Word has length 28 [2021-07-09 18:40:43,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:43,321 INFO L482 AbstractCegarLoop]: Abstraction has 6895 states and 25755 transitions. [2021-07-09 18:40:43,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:43,321 INFO L276 IsEmpty]: Start isEmpty. Operand 6895 states and 25755 transitions. [2021-07-09 18:40:43,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:43,332 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:43,332 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:43,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4091,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:43,533 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:43,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:43,533 INFO L82 PathProgramCache]: Analyzing trace with hash 827873436, now seen corresponding path program 89 times [2021-07-09 18:40:43,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:43,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823020340] [2021-07-09 18:40:43,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:43,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:43,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:43,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823020340] [2021-07-09 18:40:43,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823020340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:43,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346993673] [2021-07-09 18:40:43,559 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:43,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:40:43,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:43,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:40:43,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:43,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:43,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346993673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:43,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:43,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:40:43,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121055668] [2021-07-09 18:40:43,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:40:43,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:43,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:40:43,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:40:43,677 INFO L87 Difference]: Start difference. First operand 6895 states and 25755 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:44,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:44,007 INFO L93 Difference]: Finished difference Result 9371 states and 33680 transitions. [2021-07-09 18:40:44,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:40:44,007 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:44,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:44,027 INFO L225 Difference]: With dead ends: 9371 [2021-07-09 18:40:44,027 INFO L226 Difference]: Without dead ends: 9341 [2021-07-09 18:40:44,028 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 164.2ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:40:44,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9341 states. [2021-07-09 18:40:44,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9341 to 7751. [2021-07-09 18:40:44,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7751 states, 7750 states have (on average 3.7625806451612904) internal successors, (29160), 7750 states have internal predecessors, (29160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:44,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7751 states to 7751 states and 29160 transitions. [2021-07-09 18:40:44,184 INFO L78 Accepts]: Start accepts. Automaton has 7751 states and 29160 transitions. Word has length 28 [2021-07-09 18:40:44,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:44,184 INFO L482 AbstractCegarLoop]: Abstraction has 7751 states and 29160 transitions. [2021-07-09 18:40:44,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:44,184 INFO L276 IsEmpty]: Start isEmpty. Operand 7751 states and 29160 transitions. [2021-07-09 18:40:44,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:44,197 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:44,197 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:44,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4092 [2021-07-09 18:40:44,398 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:44,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:44,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1996015742, now seen corresponding path program 90 times [2021-07-09 18:40:44,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:44,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445276339] [2021-07-09 18:40:44,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:44,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:44,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:44,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:44,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445276339] [2021-07-09 18:40:44,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445276339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:44,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002726963] [2021-07-09 18:40:44,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:44,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:40:44,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:44,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:40:44,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:44,503 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:44,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002726963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:44,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:44,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:40:44,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573560231] [2021-07-09 18:40:44,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:40:44,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:44,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:40:44,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:40:44,504 INFO L87 Difference]: Start difference. First operand 7751 states and 29160 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:44,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:44,867 INFO L93 Difference]: Finished difference Result 9993 states and 35743 transitions. [2021-07-09 18:40:44,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:40:44,867 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:44,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:44,889 INFO L225 Difference]: With dead ends: 9993 [2021-07-09 18:40:44,889 INFO L226 Difference]: Without dead ends: 9993 [2021-07-09 18:40:44,889 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 173.7ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:40:44,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9993 states. [2021-07-09 18:40:45,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9993 to 7791. [2021-07-09 18:40:45,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7791 states, 7790 states have (on average 3.7585365853658534) internal successors, (29279), 7790 states have internal predecessors, (29279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:45,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7791 states to 7791 states and 29279 transitions. [2021-07-09 18:40:45,078 INFO L78 Accepts]: Start accepts. Automaton has 7791 states and 29279 transitions. Word has length 28 [2021-07-09 18:40:45,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:45,078 INFO L482 AbstractCegarLoop]: Abstraction has 7791 states and 29279 transitions. [2021-07-09 18:40:45,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:45,078 INFO L276 IsEmpty]: Start isEmpty. Operand 7791 states and 29279 transitions. [2021-07-09 18:40:45,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:45,091 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:45,091 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:45,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4093,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:45,291 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:45,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:45,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1866074950, now seen corresponding path program 91 times [2021-07-09 18:40:45,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:45,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646665369] [2021-07-09 18:40:45,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:45,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:45,324 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:45,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:45,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646665369] [2021-07-09 18:40:45,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646665369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:45,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692315472] [2021-07-09 18:40:45,324 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:45,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:45,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:45,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:45,399 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:45,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692315472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:45,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:45,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-07-09 18:40:45,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104664486] [2021-07-09 18:40:45,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:40:45,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:45,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:40:45,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:40:45,400 INFO L87 Difference]: Start difference. First operand 7791 states and 29279 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:45,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:45,950 INFO L93 Difference]: Finished difference Result 13376 states and 47489 transitions. [2021-07-09 18:40:45,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:40:45,951 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:45,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:45,982 INFO L225 Difference]: With dead ends: 13376 [2021-07-09 18:40:45,982 INFO L226 Difference]: Without dead ends: 13372 [2021-07-09 18:40:45,983 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 294.2ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:40:45,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13372 states. [2021-07-09 18:40:46,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13372 to 7707. [2021-07-09 18:40:46,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7707 states, 7706 states have (on average 3.7608357124318714) internal successors, (28981), 7706 states have internal predecessors, (28981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:46,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7707 states to 7707 states and 28981 transitions. [2021-07-09 18:40:46,178 INFO L78 Accepts]: Start accepts. Automaton has 7707 states and 28981 transitions. Word has length 28 [2021-07-09 18:40:46,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:46,178 INFO L482 AbstractCegarLoop]: Abstraction has 7707 states and 28981 transitions. [2021-07-09 18:40:46,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:46,178 INFO L276 IsEmpty]: Start isEmpty. Operand 7707 states and 28981 transitions. [2021-07-09 18:40:46,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:46,191 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:46,191 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:46,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4094 [2021-07-09 18:40:46,392 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:46,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:46,392 INFO L82 PathProgramCache]: Analyzing trace with hash 970254134, now seen corresponding path program 92 times [2021-07-09 18:40:46,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:46,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622526168] [2021-07-09 18:40:46,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:46,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:46,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:46,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:46,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622526168] [2021-07-09 18:40:46,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622526168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:46,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384727116] [2021-07-09 18:40:46,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:46,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:40:46,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:46,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:40:46,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:46,552 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:46,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384727116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:46,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:46,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:40:46,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327120831] [2021-07-09 18:40:46,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:40:46,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:46,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:40:46,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:40:46,553 INFO L87 Difference]: Start difference. First operand 7707 states and 28981 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:46,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:46,949 INFO L93 Difference]: Finished difference Result 10234 states and 36622 transitions. [2021-07-09 18:40:46,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:40:46,949 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:46,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:46,971 INFO L225 Difference]: With dead ends: 10234 [2021-07-09 18:40:46,971 INFO L226 Difference]: Without dead ends: 10234 [2021-07-09 18:40:46,971 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 212.9ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:40:46,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10234 states. [2021-07-09 18:40:47,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10234 to 7653. [2021-07-09 18:40:47,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7653 states, 7652 states have (on average 3.753659174072138) internal successors, (28723), 7652 states have internal predecessors, (28723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:47,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7653 states to 7653 states and 28723 transitions. [2021-07-09 18:40:47,127 INFO L78 Accepts]: Start accepts. Automaton has 7653 states and 28723 transitions. Word has length 28 [2021-07-09 18:40:47,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:47,127 INFO L482 AbstractCegarLoop]: Abstraction has 7653 states and 28723 transitions. [2021-07-09 18:40:47,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:47,127 INFO L276 IsEmpty]: Start isEmpty. Operand 7653 states and 28723 transitions. [2021-07-09 18:40:47,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:47,139 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:47,139 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:47,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4095,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:47,345 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:47,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:47,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1831555688, now seen corresponding path program 93 times [2021-07-09 18:40:47,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:47,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428254123] [2021-07-09 18:40:47,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:47,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:47,387 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:47,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:47,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428254123] [2021-07-09 18:40:47,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428254123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:47,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246843621] [2021-07-09 18:40:47,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:47,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:40:47,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:47,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:47,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:47,463 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:47,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246843621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:47,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:47,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-09 18:40:47,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214291736] [2021-07-09 18:40:47,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:40:47,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:47,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:40:47,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:40:47,464 INFO L87 Difference]: Start difference. First operand 7653 states and 28723 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:48,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:48,108 INFO L93 Difference]: Finished difference Result 13259 states and 46986 transitions. [2021-07-09 18:40:48,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:40:48,108 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:48,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:48,141 INFO L225 Difference]: With dead ends: 13259 [2021-07-09 18:40:48,141 INFO L226 Difference]: Without dead ends: 13247 [2021-07-09 18:40:48,141 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 337.9ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:40:48,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13247 states. [2021-07-09 18:40:48,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13247 to 7653. [2021-07-09 18:40:48,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7653 states, 7652 states have (on average 3.7526136957658127) internal successors, (28715), 7652 states have internal predecessors, (28715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:48,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7653 states to 7653 states and 28715 transitions. [2021-07-09 18:40:48,367 INFO L78 Accepts]: Start accepts. Automaton has 7653 states and 28715 transitions. Word has length 28 [2021-07-09 18:40:48,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:48,367 INFO L482 AbstractCegarLoop]: Abstraction has 7653 states and 28715 transitions. [2021-07-09 18:40:48,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:48,367 INFO L276 IsEmpty]: Start isEmpty. Operand 7653 states and 28715 transitions. [2021-07-09 18:40:48,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:48,380 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:48,380 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:48,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4096 [2021-07-09 18:40:48,580 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:48,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:48,580 INFO L82 PathProgramCache]: Analyzing trace with hash 695130692, now seen corresponding path program 94 times [2021-07-09 18:40:48,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:48,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078291066] [2021-07-09 18:40:48,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:48,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:48,617 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:48,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:48,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078291066] [2021-07-09 18:40:48,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078291066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:48,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946588056] [2021-07-09 18:40:48,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:48,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:40:48,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:48,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:48,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:48,707 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:48,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946588056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:48,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:48,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-09 18:40:48,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80488604] [2021-07-09 18:40:48,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:48,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:48,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:48,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:48,708 INFO L87 Difference]: Start difference. First operand 7653 states and 28715 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:49,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:49,795 INFO L93 Difference]: Finished difference Result 20233 states and 70540 transitions. [2021-07-09 18:40:49,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-07-09 18:40:49,796 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:49,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:49,845 INFO L225 Difference]: With dead ends: 20233 [2021-07-09 18:40:49,845 INFO L226 Difference]: Without dead ends: 20233 [2021-07-09 18:40:49,846 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 648.7ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-07-09 18:40:49,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20233 states. [2021-07-09 18:40:50,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20233 to 10480. [2021-07-09 18:40:50,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10480 states, 10479 states have (on average 3.7973089035213285) internal successors, (39792), 10479 states have internal predecessors, (39792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:50,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10480 states to 10480 states and 39792 transitions. [2021-07-09 18:40:50,207 INFO L78 Accepts]: Start accepts. Automaton has 10480 states and 39792 transitions. Word has length 28 [2021-07-09 18:40:50,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:50,207 INFO L482 AbstractCegarLoop]: Abstraction has 10480 states and 39792 transitions. [2021-07-09 18:40:50,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:50,207 INFO L276 IsEmpty]: Start isEmpty. Operand 10480 states and 39792 transitions. [2021-07-09 18:40:50,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:50,225 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:50,225 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:50,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4097 [2021-07-09 18:40:50,426 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:50,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:50,426 INFO L82 PathProgramCache]: Analyzing trace with hash 776506780, now seen corresponding path program 95 times [2021-07-09 18:40:50,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:50,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315204] [2021-07-09 18:40:50,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:50,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:50,464 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:50,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:50,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315204] [2021-07-09 18:40:50,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:50,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330979625] [2021-07-09 18:40:50,464 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:50,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:40:50,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:50,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:50,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:50,553 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:50,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330979625] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:50,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:50,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-09 18:40:50,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392668545] [2021-07-09 18:40:50,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:50,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:50,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:50,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:50,554 INFO L87 Difference]: Start difference. First operand 10480 states and 39792 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:51,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:51,579 INFO L93 Difference]: Finished difference Result 19460 states and 68525 transitions. [2021-07-09 18:40:51,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-09 18:40:51,579 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:51,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:51,626 INFO L225 Difference]: With dead ends: 19460 [2021-07-09 18:40:51,627 INFO L226 Difference]: Without dead ends: 19448 [2021-07-09 18:40:51,627 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1736 ImplicationChecksByTransitivity, 561.9ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:40:51,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19448 states. [2021-07-09 18:40:51,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19448 to 10294. [2021-07-09 18:40:51,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10294 states, 10293 states have (on average 3.8036529680365296) internal successors, (39151), 10293 states have internal predecessors, (39151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:51,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10294 states to 10294 states and 39151 transitions. [2021-07-09 18:40:51,950 INFO L78 Accepts]: Start accepts. Automaton has 10294 states and 39151 transitions. Word has length 28 [2021-07-09 18:40:51,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:51,950 INFO L482 AbstractCegarLoop]: Abstraction has 10294 states and 39151 transitions. [2021-07-09 18:40:51,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:51,950 INFO L276 IsEmpty]: Start isEmpty. Operand 10294 states and 39151 transitions. [2021-07-09 18:40:51,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:51,967 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:51,967 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:52,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4098 [2021-07-09 18:40:52,167 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:52,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:52,168 INFO L82 PathProgramCache]: Analyzing trace with hash -738585192, now seen corresponding path program 96 times [2021-07-09 18:40:52,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:52,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607699308] [2021-07-09 18:40:52,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:52,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:52,204 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:52,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:52,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607699308] [2021-07-09 18:40:52,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607699308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:52,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550481535] [2021-07-09 18:40:52,205 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:52,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:40:52,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:52,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:52,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:52,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550481535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:52,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:52,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-09 18:40:52,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181086783] [2021-07-09 18:40:52,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:52,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:52,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:52,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:52,293 INFO L87 Difference]: Start difference. First operand 10294 states and 39151 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:53,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:53,300 INFO L93 Difference]: Finished difference Result 19263 states and 67830 transitions. [2021-07-09 18:40:53,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 18:40:53,300 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:53,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:53,346 INFO L225 Difference]: With dead ends: 19263 [2021-07-09 18:40:53,347 INFO L226 Difference]: Without dead ends: 19227 [2021-07-09 18:40:53,347 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 540.7ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:40:53,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19227 states. [2021-07-09 18:40:53,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19227 to 10338. [2021-07-09 18:40:53,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10338 states, 10337 states have (on average 3.8017800135435813) internal successors, (39299), 10337 states have internal predecessors, (39299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:53,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10338 states to 10338 states and 39299 transitions. [2021-07-09 18:40:53,664 INFO L78 Accepts]: Start accepts. Automaton has 10338 states and 39299 transitions. Word has length 28 [2021-07-09 18:40:53,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:53,664 INFO L482 AbstractCegarLoop]: Abstraction has 10338 states and 39299 transitions. [2021-07-09 18:40:53,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:53,664 INFO L276 IsEmpty]: Start isEmpty. Operand 10338 states and 39299 transitions. [2021-07-09 18:40:53,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:53,681 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:53,681 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:53,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4099,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:53,881 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:53,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:53,882 INFO L82 PathProgramCache]: Analyzing trace with hash 858541524, now seen corresponding path program 97 times [2021-07-09 18:40:53,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:53,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386585638] [2021-07-09 18:40:53,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:53,919 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:53,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:53,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386585638] [2021-07-09 18:40:53,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386585638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:53,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38105944] [2021-07-09 18:40:53,919 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:53,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:53,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:53,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:54,030 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:54,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38105944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:54,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:54,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 18:40:54,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439863952] [2021-07-09 18:40:54,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:40:54,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:54,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:40:54,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:40:54,030 INFO L87 Difference]: Start difference. First operand 10338 states and 39299 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:55,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:55,430 INFO L93 Difference]: Finished difference Result 19164 states and 67607 transitions. [2021-07-09 18:40:55,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-07-09 18:40:55,431 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:55,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:55,480 INFO L225 Difference]: With dead ends: 19164 [2021-07-09 18:40:55,481 INFO L226 Difference]: Without dead ends: 19164 [2021-07-09 18:40:55,481 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2648 ImplicationChecksByTransitivity, 858.3ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-07-09 18:40:55,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19164 states. [2021-07-09 18:40:55,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19164 to 10534. [2021-07-09 18:40:55,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10534 states, 10533 states have (on average 3.79274660590525) internal successors, (39949), 10533 states have internal predecessors, (39949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:55,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10534 states to 10534 states and 39949 transitions. [2021-07-09 18:40:55,791 INFO L78 Accepts]: Start accepts. Automaton has 10534 states and 39949 transitions. Word has length 28 [2021-07-09 18:40:55,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:55,791 INFO L482 AbstractCegarLoop]: Abstraction has 10534 states and 39949 transitions. [2021-07-09 18:40:55,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:55,791 INFO L276 IsEmpty]: Start isEmpty. Operand 10534 states and 39949 transitions. [2021-07-09 18:40:55,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:55,808 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:55,808 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:56,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4100 [2021-07-09 18:40:56,008 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:56,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:56,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1793386618, now seen corresponding path program 98 times [2021-07-09 18:40:56,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:56,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924018773] [2021-07-09 18:40:56,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:56,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:56,046 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:56,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:56,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924018773] [2021-07-09 18:40:56,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924018773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:56,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707795865] [2021-07-09 18:40:56,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:56,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:40:56,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:56,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:56,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:56,153 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:56,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707795865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:56,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:56,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 18:40:56,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190477057] [2021-07-09 18:40:56,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:40:56,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:56,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:40:56,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:40:56,154 INFO L87 Difference]: Start difference. First operand 10534 states and 39949 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:57,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:57,377 INFO L93 Difference]: Finished difference Result 18787 states and 66570 transitions. [2021-07-09 18:40:57,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-09 18:40:57,377 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:57,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:57,431 INFO L225 Difference]: With dead ends: 18787 [2021-07-09 18:40:57,432 INFO L226 Difference]: Without dead ends: 18775 [2021-07-09 18:40:57,432 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 758.4ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-07-09 18:40:57,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18775 states. [2021-07-09 18:40:57,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18775 to 10416. [2021-07-09 18:40:57,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10416 states, 10415 states have (on average 3.797215554488718) internal successors, (39548), 10415 states have internal predecessors, (39548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:57,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10416 states to 10416 states and 39548 transitions. [2021-07-09 18:40:57,724 INFO L78 Accepts]: Start accepts. Automaton has 10416 states and 39548 transitions. Word has length 28 [2021-07-09 18:40:57,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:57,724 INFO L482 AbstractCegarLoop]: Abstraction has 10416 states and 39548 transitions. [2021-07-09 18:40:57,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:57,724 INFO L276 IsEmpty]: Start isEmpty. Operand 10416 states and 39548 transitions. [2021-07-09 18:40:57,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:57,742 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:57,742 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:57,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4101 [2021-07-09 18:40:57,942 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:57,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:57,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1234123500, now seen corresponding path program 99 times [2021-07-09 18:40:57,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:57,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616363265] [2021-07-09 18:40:57,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:57,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:57,980 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:57,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:57,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616363265] [2021-07-09 18:40:57,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616363265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:57,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720677928] [2021-07-09 18:40:57,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:58,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:40:58,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:58,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:58,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:58,077 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:58,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720677928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:58,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:58,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-09 18:40:58,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172303562] [2021-07-09 18:40:58,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:40:58,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:58,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:40:58,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:40:58,078 INFO L87 Difference]: Start difference. First operand 10416 states and 39548 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:59,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:59,113 INFO L93 Difference]: Finished difference Result 18027 states and 64486 transitions. [2021-07-09 18:40:59,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 18:40:59,113 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:59,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:59,156 INFO L225 Difference]: With dead ends: 18027 [2021-07-09 18:40:59,157 INFO L226 Difference]: Without dead ends: 17991 [2021-07-09 18:40:59,157 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 556.3ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:40:59,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17991 states. [2021-07-09 18:40:59,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17991 to 10440. [2021-07-09 18:40:59,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10440 states, 10439 states have (on average 3.796149056423029) internal successors, (39628), 10439 states have internal predecessors, (39628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:59,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10440 states to 10440 states and 39628 transitions. [2021-07-09 18:40:59,444 INFO L78 Accepts]: Start accepts. Automaton has 10440 states and 39628 transitions. Word has length 28 [2021-07-09 18:40:59,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:59,444 INFO L482 AbstractCegarLoop]: Abstraction has 10440 states and 39628 transitions. [2021-07-09 18:40:59,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:59,444 INFO L276 IsEmpty]: Start isEmpty. Operand 10440 states and 39628 transitions. [2021-07-09 18:40:59,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:59,462 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:59,462 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:59,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4102,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:59,662 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:59,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:59,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1584729920, now seen corresponding path program 100 times [2021-07-09 18:40:59,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:59,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159254576] [2021-07-09 18:40:59,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:59,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:59,694 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:59,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:59,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159254576] [2021-07-09 18:40:59,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159254576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:59,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422192919] [2021-07-09 18:40:59,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:59,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:40:59,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:59,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:59,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:59,812 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:59,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422192919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:59,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:59,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:40:59,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915155884] [2021-07-09 18:40:59,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:40:59,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:59,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:40:59,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:40:59,813 INFO L87 Difference]: Start difference. First operand 10440 states and 39628 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:01,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:01,018 INFO L93 Difference]: Finished difference Result 26119 states and 92958 transitions. [2021-07-09 18:41:01,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-09 18:41:01,018 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:41:01,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:01,153 INFO L225 Difference]: With dead ends: 26119 [2021-07-09 18:41:01,153 INFO L226 Difference]: Without dead ends: 26119 [2021-07-09 18:41:01,154 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 714.2ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-07-09 18:41:01,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26119 states. [2021-07-09 18:41:01,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26119 to 10727. [2021-07-09 18:41:01,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10727 states, 10726 states have (on average 3.821928025358941) internal successors, (40994), 10726 states have internal predecessors, (40994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:01,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10727 states to 10727 states and 40994 transitions. [2021-07-09 18:41:01,500 INFO L78 Accepts]: Start accepts. Automaton has 10727 states and 40994 transitions. Word has length 28 [2021-07-09 18:41:01,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:01,500 INFO L482 AbstractCegarLoop]: Abstraction has 10727 states and 40994 transitions. [2021-07-09 18:41:01,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:01,501 INFO L276 IsEmpty]: Start isEmpty. Operand 10727 states and 40994 transitions. [2021-07-09 18:41:01,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:01,519 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:01,519 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:01,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4103,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:01,719 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:01,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:01,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1017777840, now seen corresponding path program 101 times [2021-07-09 18:41:01,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:01,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683781533] [2021-07-09 18:41:01,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:01,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:01,751 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:01,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:01,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683781533] [2021-07-09 18:41:01,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683781533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:01,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551392411] [2021-07-09 18:41:01,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:01,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:41:01,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:01,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:01,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:01,869 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:01,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551392411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:01,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:01,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:41:01,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631812608] [2021-07-09 18:41:01,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:41:01,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:01,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:41:01,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:41:01,870 INFO L87 Difference]: Start difference. First operand 10727 states and 40994 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:03,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:03,135 INFO L93 Difference]: Finished difference Result 25550 states and 91560 transitions. [2021-07-09 18:41:03,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-09 18:41:03,135 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:41:03,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:03,205 INFO L225 Difference]: With dead ends: 25550 [2021-07-09 18:41:03,205 INFO L226 Difference]: Without dead ends: 25550 [2021-07-09 18:41:03,206 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 695.9ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-07-09 18:41:03,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25550 states. [2021-07-09 18:41:03,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25550 to 10629. [2021-07-09 18:41:03,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10629 states, 10628 states have (on average 3.8091832894241624) internal successors, (40484), 10628 states have internal predecessors, (40484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:03,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10629 states to 10629 states and 40484 transitions. [2021-07-09 18:41:03,583 INFO L78 Accepts]: Start accepts. Automaton has 10629 states and 40484 transitions. Word has length 28 [2021-07-09 18:41:03,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:03,583 INFO L482 AbstractCegarLoop]: Abstraction has 10629 states and 40484 transitions. [2021-07-09 18:41:03,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:03,583 INFO L276 IsEmpty]: Start isEmpty. Operand 10629 states and 40484 transitions. [2021-07-09 18:41:03,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:03,601 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:03,601 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:03,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4104 [2021-07-09 18:41:03,801 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:03,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:03,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1216329654, now seen corresponding path program 102 times [2021-07-09 18:41:03,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:03,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663515509] [2021-07-09 18:41:03,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:03,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:03,835 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:03,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:03,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663515509] [2021-07-09 18:41:03,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663515509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:03,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522391335] [2021-07-09 18:41:03,835 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:03,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:41:03,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:03,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:03,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:03,948 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:03,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522391335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:03,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:03,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 18:41:03,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573999003] [2021-07-09 18:41:03,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:41:03,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:03,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:41:03,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:41:03,949 INFO L87 Difference]: Start difference. First operand 10629 states and 40484 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:04,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:04,737 INFO L93 Difference]: Finished difference Result 20289 states and 72951 transitions. [2021-07-09 18:41:04,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:41:04,737 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:41:04,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:04,788 INFO L225 Difference]: With dead ends: 20289 [2021-07-09 18:41:04,789 INFO L226 Difference]: Without dead ends: 20289 [2021-07-09 18:41:04,789 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 427.8ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:41:04,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20289 states. [2021-07-09 18:41:05,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20289 to 10638. [2021-07-09 18:41:05,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10638 states, 10637 states have (on average 3.8081225909560965) internal successors, (40507), 10637 states have internal predecessors, (40507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:05,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10638 states to 10638 states and 40507 transitions. [2021-07-09 18:41:05,109 INFO L78 Accepts]: Start accepts. Automaton has 10638 states and 40507 transitions. Word has length 28 [2021-07-09 18:41:05,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:05,109 INFO L482 AbstractCegarLoop]: Abstraction has 10638 states and 40507 transitions. [2021-07-09 18:41:05,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:05,110 INFO L276 IsEmpty]: Start isEmpty. Operand 10638 states and 40507 transitions. [2021-07-09 18:41:05,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:05,127 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:05,127 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:05,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4105,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:05,328 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:05,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:05,328 INFO L82 PathProgramCache]: Analyzing trace with hash 541607776, now seen corresponding path program 103 times [2021-07-09 18:41:05,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:05,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848484261] [2021-07-09 18:41:05,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:05,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:05,360 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:05,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:05,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848484261] [2021-07-09 18:41:05,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848484261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:05,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100251907] [2021-07-09 18:41:05,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:05,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:05,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:05,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:05,466 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:05,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100251907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:05,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:05,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 18:41:05,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679093130] [2021-07-09 18:41:05,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:41:05,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:05,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:41:05,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:41:05,467 INFO L87 Difference]: Start difference. First operand 10638 states and 40507 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:06,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:06,218 INFO L93 Difference]: Finished difference Result 18838 states and 68311 transitions. [2021-07-09 18:41:06,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:41:06,219 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:41:06,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:06,265 INFO L225 Difference]: With dead ends: 18838 [2021-07-09 18:41:06,266 INFO L226 Difference]: Without dead ends: 18838 [2021-07-09 18:41:06,266 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 388.8ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:41:06,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18838 states. [2021-07-09 18:41:06,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18838 to 10650. [2021-07-09 18:41:06,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10650 states, 10649 states have (on average 3.807399755845619) internal successors, (40545), 10649 states have internal predecessors, (40545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:06,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10650 states to 10650 states and 40545 transitions. [2021-07-09 18:41:06,647 INFO L78 Accepts]: Start accepts. Automaton has 10650 states and 40545 transitions. Word has length 28 [2021-07-09 18:41:06,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:06,647 INFO L482 AbstractCegarLoop]: Abstraction has 10650 states and 40545 transitions. [2021-07-09 18:41:06,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:06,647 INFO L276 IsEmpty]: Start isEmpty. Operand 10650 states and 40545 transitions. [2021-07-09 18:41:06,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:06,664 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:06,664 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:06,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4106,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:06,865 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:06,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:06,865 INFO L82 PathProgramCache]: Analyzing trace with hash -2099999344, now seen corresponding path program 104 times [2021-07-09 18:41:06,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:06,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944388384] [2021-07-09 18:41:06,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:06,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:06,898 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:06,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:06,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944388384] [2021-07-09 18:41:06,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944388384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:06,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665803372] [2021-07-09 18:41:06,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:06,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:06,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:06,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:06,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:07,014 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:07,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665803372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:07,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:07,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:41:07,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864100003] [2021-07-09 18:41:07,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:41:07,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:07,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:41:07,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:41:07,015 INFO L87 Difference]: Start difference. First operand 10650 states and 40545 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:08,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:08,008 INFO L93 Difference]: Finished difference Result 19442 states and 70046 transitions. [2021-07-09 18:41:08,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-09 18:41:08,009 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:41:08,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:08,055 INFO L225 Difference]: With dead ends: 19442 [2021-07-09 18:41:08,056 INFO L226 Difference]: Without dead ends: 19442 [2021-07-09 18:41:08,056 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 634.3ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 18:41:08,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19442 states. [2021-07-09 18:41:08,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19442 to 10758. [2021-07-09 18:41:08,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10758 states, 10757 states have (on average 3.8002231105326763) internal successors, (40879), 10757 states have internal predecessors, (40879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:08,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10758 states to 10758 states and 40879 transitions. [2021-07-09 18:41:08,372 INFO L78 Accepts]: Start accepts. Automaton has 10758 states and 40879 transitions. Word has length 28 [2021-07-09 18:41:08,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:08,372 INFO L482 AbstractCegarLoop]: Abstraction has 10758 states and 40879 transitions. [2021-07-09 18:41:08,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:08,373 INFO L276 IsEmpty]: Start isEmpty. Operand 10758 states and 40879 transitions. [2021-07-09 18:41:08,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:08,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:08,390 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:08,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4107,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:08,590 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:08,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:08,590 INFO L82 PathProgramCache]: Analyzing trace with hash -456960190, now seen corresponding path program 105 times [2021-07-09 18:41:08,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:08,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612387034] [2021-07-09 18:41:08,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:08,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:08,622 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:08,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:08,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612387034] [2021-07-09 18:41:08,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612387034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:08,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677190945] [2021-07-09 18:41:08,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:08,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:41:08,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:08,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:08,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:08,809 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:08,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677190945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:08,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:08,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:41:08,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480694116] [2021-07-09 18:41:08,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:41:08,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:08,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:41:08,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:41:08,810 INFO L87 Difference]: Start difference. First operand 10758 states and 40879 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:09,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:09,762 INFO L93 Difference]: Finished difference Result 19017 states and 68890 transitions. [2021-07-09 18:41:09,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 18:41:09,762 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:41:09,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:09,806 INFO L225 Difference]: With dead ends: 19017 [2021-07-09 18:41:09,807 INFO L226 Difference]: Without dead ends: 19013 [2021-07-09 18:41:09,807 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 635.9ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:41:09,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19013 states. [2021-07-09 18:41:10,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19013 to 10684. [2021-07-09 18:41:10,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10684 states, 10683 states have (on average 3.804174857249836) internal successors, (40640), 10683 states have internal predecessors, (40640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:10,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10684 states to 10684 states and 40640 transitions. [2021-07-09 18:41:10,153 INFO L78 Accepts]: Start accepts. Automaton has 10684 states and 40640 transitions. Word has length 28 [2021-07-09 18:41:10,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:10,153 INFO L482 AbstractCegarLoop]: Abstraction has 10684 states and 40640 transitions. [2021-07-09 18:41:10,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:10,153 INFO L276 IsEmpty]: Start isEmpty. Operand 10684 states and 40640 transitions. [2021-07-09 18:41:10,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:10,171 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:10,171 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:10,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4108 [2021-07-09 18:41:10,372 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:10,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:10,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1748478926, now seen corresponding path program 106 times [2021-07-09 18:41:10,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:10,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536233549] [2021-07-09 18:41:10,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:10,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:10,410 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:10,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:10,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536233549] [2021-07-09 18:41:10,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536233549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:10,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570535233] [2021-07-09 18:41:10,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:10,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:41:10,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:10,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:10,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:10,519 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:10,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570535233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:10,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:10,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:41:10,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912496852] [2021-07-09 18:41:10,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:41:10,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:10,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:41:10,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:41:10,520 INFO L87 Difference]: Start difference. First operand 10684 states and 40640 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:11,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:11,507 INFO L93 Difference]: Finished difference Result 18448 states and 66382 transitions. [2021-07-09 18:41:11,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-09 18:41:11,507 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:41:11,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:11,549 INFO L225 Difference]: With dead ends: 18448 [2021-07-09 18:41:11,549 INFO L226 Difference]: Without dead ends: 18448 [2021-07-09 18:41:11,550 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 612.8ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:41:11,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18448 states. [2021-07-09 18:41:11,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18448 to 10911. [2021-07-09 18:41:11,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10911 states, 10910 states have (on average 3.807332722273144) internal successors, (41538), 10910 states have internal predecessors, (41538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:11,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10911 states to 10911 states and 41538 transitions. [2021-07-09 18:41:11,831 INFO L78 Accepts]: Start accepts. Automaton has 10911 states and 41538 transitions. Word has length 28 [2021-07-09 18:41:11,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:11,831 INFO L482 AbstractCegarLoop]: Abstraction has 10911 states and 41538 transitions. [2021-07-09 18:41:11,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:11,831 INFO L276 IsEmpty]: Start isEmpty. Operand 10911 states and 41538 transitions. [2021-07-09 18:41:11,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:11,849 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:11,849 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:12,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4109 [2021-07-09 18:41:12,049 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:12,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:12,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1366168690, now seen corresponding path program 107 times [2021-07-09 18:41:12,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:12,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966125002] [2021-07-09 18:41:12,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:12,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:12,087 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:12,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:12,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966125002] [2021-07-09 18:41:12,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966125002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:12,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058864117] [2021-07-09 18:41:12,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:12,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:41:12,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:12,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:12,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:12,191 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:12,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058864117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:12,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:12,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:41:12,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617510443] [2021-07-09 18:41:12,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:41:12,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:12,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:41:12,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:41:12,192 INFO L87 Difference]: Start difference. First operand 10911 states and 41538 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:13,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:13,111 INFO L93 Difference]: Finished difference Result 18161 states and 65584 transitions. [2021-07-09 18:41:13,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 18:41:13,111 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:41:13,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:13,153 INFO L225 Difference]: With dead ends: 18161 [2021-07-09 18:41:13,154 INFO L226 Difference]: Without dead ends: 18149 [2021-07-09 18:41:13,154 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 550.9ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:41:13,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18149 states. [2021-07-09 18:41:13,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18149 to 11013. [2021-07-09 18:41:13,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11013 states, 11012 states have (on average 3.801398474391573) internal successors, (41861), 11012 states have internal predecessors, (41861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:13,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11013 states to 11013 states and 41861 transitions. [2021-07-09 18:41:13,443 INFO L78 Accepts]: Start accepts. Automaton has 11013 states and 41861 transitions. Word has length 28 [2021-07-09 18:41:13,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:13,443 INFO L482 AbstractCegarLoop]: Abstraction has 11013 states and 41861 transitions. [2021-07-09 18:41:13,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:13,443 INFO L276 IsEmpty]: Start isEmpty. Operand 11013 states and 41861 transitions. [2021-07-09 18:41:13,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:13,461 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:13,461 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:13,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4110 [2021-07-09 18:41:13,661 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:13,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:13,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1561241668, now seen corresponding path program 70 times [2021-07-09 18:41:13,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:13,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933613151] [2021-07-09 18:41:13,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:13,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:13,699 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:13,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:13,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933613151] [2021-07-09 18:41:13,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933613151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:13,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439752189] [2021-07-09 18:41:13,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:13,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:41:13,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:13,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:13,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:13,781 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:13,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439752189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:13,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:13,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-09 18:41:13,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552809901] [2021-07-09 18:41:13,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:41:13,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:13,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:41:13,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:41:13,781 INFO L87 Difference]: Start difference. First operand 11013 states and 41861 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:14,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:14,229 INFO L93 Difference]: Finished difference Result 15676 states and 57990 transitions. [2021-07-09 18:41:14,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:41:14,230 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:41:14,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:14,266 INFO L225 Difference]: With dead ends: 15676 [2021-07-09 18:41:14,266 INFO L226 Difference]: Without dead ends: 15676 [2021-07-09 18:41:14,266 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 229.1ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:41:14,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15676 states. [2021-07-09 18:41:14,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15676 to 11085. [2021-07-09 18:41:14,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11085 states, 11084 states have (on average 3.7969144713099965) internal successors, (42085), 11084 states have internal predecessors, (42085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:14,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11085 states to 11085 states and 42085 transitions. [2021-07-09 18:41:14,524 INFO L78 Accepts]: Start accepts. Automaton has 11085 states and 42085 transitions. Word has length 28 [2021-07-09 18:41:14,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:14,524 INFO L482 AbstractCegarLoop]: Abstraction has 11085 states and 42085 transitions. [2021-07-09 18:41:14,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:14,525 INFO L276 IsEmpty]: Start isEmpty. Operand 11085 states and 42085 transitions. [2021-07-09 18:41:14,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:14,543 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:14,543 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:14,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4111 [2021-07-09 18:41:14,744 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:14,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:14,744 INFO L82 PathProgramCache]: Analyzing trace with hash 963219036, now seen corresponding path program 71 times [2021-07-09 18:41:14,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:14,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225831060] [2021-07-09 18:41:14,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:14,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:14,776 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:14,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:14,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225831060] [2021-07-09 18:41:14,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225831060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:14,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919647845] [2021-07-09 18:41:14,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:14,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:41:14,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:14,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:14,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:14,927 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:14,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919647845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:14,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:14,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:41:14,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561765968] [2021-07-09 18:41:14,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:41:14,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:14,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:41:14,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:41:14,928 INFO L87 Difference]: Start difference. First operand 11085 states and 42085 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:15,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:15,420 INFO L93 Difference]: Finished difference Result 16651 states and 60827 transitions. [2021-07-09 18:41:15,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:41:15,421 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:41:15,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:15,458 INFO L225 Difference]: With dead ends: 16651 [2021-07-09 18:41:15,458 INFO L226 Difference]: Without dead ends: 16651 [2021-07-09 18:41:15,459 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 270.5ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:41:15,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16651 states. [2021-07-09 18:41:15,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16651 to 11413. [2021-07-09 18:41:15,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11413 states, 11412 states have (on average 3.7797932001402033) internal successors, (43135), 11412 states have internal predecessors, (43135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:15,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11413 states to 11413 states and 43135 transitions. [2021-07-09 18:41:15,727 INFO L78 Accepts]: Start accepts. Automaton has 11413 states and 43135 transitions. Word has length 28 [2021-07-09 18:41:15,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:15,727 INFO L482 AbstractCegarLoop]: Abstraction has 11413 states and 43135 transitions. [2021-07-09 18:41:15,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:15,727 INFO L276 IsEmpty]: Start isEmpty. Operand 11413 states and 43135 transitions. [2021-07-09 18:41:15,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:15,745 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:15,745 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:15,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4112 [2021-07-09 18:41:15,945 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:15,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:15,946 INFO L82 PathProgramCache]: Analyzing trace with hash 918397894, now seen corresponding path program 72 times [2021-07-09 18:41:15,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:15,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609568460] [2021-07-09 18:41:15,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:15,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:15,977 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:15,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:15,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609568460] [2021-07-09 18:41:15,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609568460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:15,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915096208] [2021-07-09 18:41:15,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:16,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:41:16,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:16,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:16,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:16,056 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:16,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915096208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:16,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:16,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:41:16,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607016134] [2021-07-09 18:41:16,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:41:16,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:16,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:41:16,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:41:16,057 INFO L87 Difference]: Start difference. First operand 11413 states and 43135 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:16,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:16,480 INFO L93 Difference]: Finished difference Result 16138 states and 59485 transitions. [2021-07-09 18:41:16,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:41:16,481 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:41:16,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:16,517 INFO L225 Difference]: With dead ends: 16138 [2021-07-09 18:41:16,517 INFO L226 Difference]: Without dead ends: 16130 [2021-07-09 18:41:16,518 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 208.9ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:41:16,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16130 states. [2021-07-09 18:41:16,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16130 to 11353. [2021-07-09 18:41:16,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11353 states, 11352 states have (on average 3.781800563777308) internal successors, (42931), 11352 states have internal predecessors, (42931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:16,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11353 states to 11353 states and 42931 transitions. [2021-07-09 18:41:16,775 INFO L78 Accepts]: Start accepts. Automaton has 11353 states and 42931 transitions. Word has length 28 [2021-07-09 18:41:16,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:16,775 INFO L482 AbstractCegarLoop]: Abstraction has 11353 states and 42931 transitions. [2021-07-09 18:41:16,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:16,775 INFO L276 IsEmpty]: Start isEmpty. Operand 11353 states and 42931 transitions. [2021-07-09 18:41:16,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:16,863 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:16,863 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:17,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4113,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:17,064 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:17,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:17,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1515734552, now seen corresponding path program 73 times [2021-07-09 18:41:17,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:17,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642864634] [2021-07-09 18:41:17,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:17,101 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:17,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:17,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642864634] [2021-07-09 18:41:17,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642864634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:17,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031385422] [2021-07-09 18:41:17,101 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:17,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:17,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:17,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:17,177 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:17,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031385422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:17,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:17,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-09 18:41:17,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994009052] [2021-07-09 18:41:17,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:41:17,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:17,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:41:17,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:41:17,178 INFO L87 Difference]: Start difference. First operand 11353 states and 42931 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:17,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:17,608 INFO L93 Difference]: Finished difference Result 16038 states and 59197 transitions. [2021-07-09 18:41:17,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:41:17,609 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:41:17,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:17,649 INFO L225 Difference]: With dead ends: 16038 [2021-07-09 18:41:17,649 INFO L226 Difference]: Without dead ends: 16026 [2021-07-09 18:41:17,649 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 221.8ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:41:17,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16026 states. [2021-07-09 18:41:17,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16026 to 11325. [2021-07-09 18:41:17,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11325 states, 11324 states have (on average 3.7826739667961853) internal successors, (42835), 11324 states have internal predecessors, (42835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:17,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11325 states to 11325 states and 42835 transitions. [2021-07-09 18:41:17,900 INFO L78 Accepts]: Start accepts. Automaton has 11325 states and 42835 transitions. Word has length 28 [2021-07-09 18:41:17,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:17,900 INFO L482 AbstractCegarLoop]: Abstraction has 11325 states and 42835 transitions. [2021-07-09 18:41:17,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:17,901 INFO L276 IsEmpty]: Start isEmpty. Operand 11325 states and 42835 transitions. [2021-07-09 18:41:17,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:17,920 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:17,920 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:18,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4114,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:18,120 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:18,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:18,121 INFO L82 PathProgramCache]: Analyzing trace with hash 860325080, now seen corresponding path program 74 times [2021-07-09 18:41:18,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:18,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283594078] [2021-07-09 18:41:18,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:18,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:18,153 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:18,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:18,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283594078] [2021-07-09 18:41:18,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283594078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:18,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072362408] [2021-07-09 18:41:18,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:18,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:18,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:18,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:18,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:18,269 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:18,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072362408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:18,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:18,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 18:41:18,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817188587] [2021-07-09 18:41:18,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:41:18,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:18,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:41:18,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:41:18,270 INFO L87 Difference]: Start difference. First operand 11325 states and 42835 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:19,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:19,165 INFO L93 Difference]: Finished difference Result 21822 states and 77756 transitions. [2021-07-09 18:41:19,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:41:19,165 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:41:19,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:19,216 INFO L225 Difference]: With dead ends: 21822 [2021-07-09 18:41:19,216 INFO L226 Difference]: Without dead ends: 21822 [2021-07-09 18:41:19,217 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 480.8ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:41:19,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21822 states. [2021-07-09 18:41:19,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21822 to 11307. [2021-07-09 18:41:19,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11307 states, 11306 states have (on average 3.7813550327259864) internal successors, (42752), 11306 states have internal predecessors, (42752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:19,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11307 states to 11307 states and 42752 transitions. [2021-07-09 18:41:19,607 INFO L78 Accepts]: Start accepts. Automaton has 11307 states and 42752 transitions. Word has length 28 [2021-07-09 18:41:19,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:19,607 INFO L482 AbstractCegarLoop]: Abstraction has 11307 states and 42752 transitions. [2021-07-09 18:41:19,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:19,607 INFO L276 IsEmpty]: Start isEmpty. Operand 11307 states and 42752 transitions. [2021-07-09 18:41:19,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:19,627 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:19,627 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:19,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4115,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:19,827 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:19,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:19,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1387096988, now seen corresponding path program 108 times [2021-07-09 18:41:19,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:19,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757049063] [2021-07-09 18:41:19,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:19,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:19,855 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:19,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:19,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757049063] [2021-07-09 18:41:19,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757049063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:19,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221320796] [2021-07-09 18:41:19,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:19,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:41:19,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:19,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:41:19,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:19,964 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:19,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221320796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:19,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:19,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 18:41:19,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204865227] [2021-07-09 18:41:19,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:41:19,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:19,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:41:19,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:41:19,965 INFO L87 Difference]: Start difference. First operand 11307 states and 42752 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:20,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:20,638 INFO L93 Difference]: Finished difference Result 17653 states and 63688 transitions. [2021-07-09 18:41:20,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:41:20,638 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:41:20,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:20,679 INFO L225 Difference]: With dead ends: 17653 [2021-07-09 18:41:20,679 INFO L226 Difference]: Without dead ends: 17640 [2021-07-09 18:41:20,680 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 360.1ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:41:20,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17640 states. [2021-07-09 18:41:20,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17640 to 12618. [2021-07-09 18:41:20,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12618 states, 12617 states have (on average 3.8484584291035904) internal successors, (48556), 12617 states have internal predecessors, (48556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:20,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12618 states to 12618 states and 48556 transitions. [2021-07-09 18:41:20,992 INFO L78 Accepts]: Start accepts. Automaton has 12618 states and 48556 transitions. Word has length 28 [2021-07-09 18:41:20,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:20,992 INFO L482 AbstractCegarLoop]: Abstraction has 12618 states and 48556 transitions. [2021-07-09 18:41:20,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:20,992 INFO L276 IsEmpty]: Start isEmpty. Operand 12618 states and 48556 transitions. [2021-07-09 18:41:21,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:21,014 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:21,014 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:21,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4116 [2021-07-09 18:41:21,216 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:21,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:21,216 INFO L82 PathProgramCache]: Analyzing trace with hash 2059509770, now seen corresponding path program 109 times [2021-07-09 18:41:21,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:21,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511002002] [2021-07-09 18:41:21,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:21,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:21,240 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:21,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:21,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511002002] [2021-07-09 18:41:21,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511002002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:21,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420460142] [2021-07-09 18:41:21,241 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:21,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:21,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:41:21,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:21,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:21,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420460142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:21,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:21,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 18:41:21,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190541246] [2021-07-09 18:41:21,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:41:21,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:21,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:41:21,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:41:21,341 INFO L87 Difference]: Start difference. First operand 12618 states and 48556 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:22,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:22,041 INFO L93 Difference]: Finished difference Result 17754 states and 63945 transitions. [2021-07-09 18:41:22,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:41:22,041 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:41:22,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:22,081 INFO L225 Difference]: With dead ends: 17754 [2021-07-09 18:41:22,082 INFO L226 Difference]: Without dead ends: 17748 [2021-07-09 18:41:22,082 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 380.1ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:41:22,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17748 states. [2021-07-09 18:41:22,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17748 to 12591. [2021-07-09 18:41:22,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12591 states, 12590 states have (on average 3.8476568705321683) internal successors, (48442), 12590 states have internal predecessors, (48442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:22,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12591 states to 12591 states and 48442 transitions. [2021-07-09 18:41:22,434 INFO L78 Accepts]: Start accepts. Automaton has 12591 states and 48442 transitions. Word has length 28 [2021-07-09 18:41:22,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:22,434 INFO L482 AbstractCegarLoop]: Abstraction has 12591 states and 48442 transitions. [2021-07-09 18:41:22,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:22,434 INFO L276 IsEmpty]: Start isEmpty. Operand 12591 states and 48442 transitions. [2021-07-09 18:41:22,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:22,456 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:22,456 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:22,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4117,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:22,656 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:22,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:22,656 INFO L82 PathProgramCache]: Analyzing trace with hash 244170948, now seen corresponding path program 110 times [2021-07-09 18:41:22,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:22,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755378887] [2021-07-09 18:41:22,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:22,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:22,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:22,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:22,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755378887] [2021-07-09 18:41:22,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755378887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:22,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084884799] [2021-07-09 18:41:22,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:22,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:22,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:22,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:41:22,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:22,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:22,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084884799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:22,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:22,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-09 18:41:22,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387802108] [2021-07-09 18:41:22,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:41:22,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:22,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:41:22,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:41:22,775 INFO L87 Difference]: Start difference. First operand 12591 states and 48442 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:23,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:23,347 INFO L93 Difference]: Finished difference Result 19810 states and 71449 transitions. [2021-07-09 18:41:23,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:41:23,348 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:41:23,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:23,396 INFO L225 Difference]: With dead ends: 19810 [2021-07-09 18:41:23,396 INFO L226 Difference]: Without dead ends: 19797 [2021-07-09 18:41:23,397 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 296.2ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:41:23,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19797 states. [2021-07-09 18:41:23,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19797 to 12651. [2021-07-09 18:41:23,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12651 states, 12650 states have (on average 3.8523320158102767) internal successors, (48732), 12650 states have internal predecessors, (48732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:23,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12651 states to 12651 states and 48732 transitions. [2021-07-09 18:41:23,754 INFO L78 Accepts]: Start accepts. Automaton has 12651 states and 48732 transitions. Word has length 28 [2021-07-09 18:41:23,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:23,754 INFO L482 AbstractCegarLoop]: Abstraction has 12651 states and 48732 transitions. [2021-07-09 18:41:23,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:23,754 INFO L276 IsEmpty]: Start isEmpty. Operand 12651 states and 48732 transitions. [2021-07-09 18:41:23,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:23,778 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:23,778 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:23,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4118 [2021-07-09 18:41:23,979 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:23,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:23,979 INFO L82 PathProgramCache]: Analyzing trace with hash -438573382, now seen corresponding path program 111 times [2021-07-09 18:41:23,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:23,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673547948] [2021-07-09 18:41:23,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:23,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:24,004 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:24,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:24,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673547948] [2021-07-09 18:41:24,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673547948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:24,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779930185] [2021-07-09 18:41:24,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:24,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:41:24,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:24,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:41:24,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:24,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:24,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779930185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:24,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:24,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-09 18:41:24,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001985192] [2021-07-09 18:41:24,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:41:24,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:24,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:41:24,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:41:24,102 INFO L87 Difference]: Start difference. First operand 12651 states and 48732 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:24,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:24,813 INFO L93 Difference]: Finished difference Result 20959 states and 75039 transitions. [2021-07-09 18:41:24,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:41:24,813 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:41:24,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:24,861 INFO L225 Difference]: With dead ends: 20959 [2021-07-09 18:41:24,862 INFO L226 Difference]: Without dead ends: 20959 [2021-07-09 18:41:24,862 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 358.6ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:41:24,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20959 states. [2021-07-09 18:41:25,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20959 to 12667. [2021-07-09 18:41:25,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12667 states, 12666 states have (on average 3.849281541133744) internal successors, (48755), 12666 states have internal predecessors, (48755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:25,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12667 states to 12667 states and 48755 transitions. [2021-07-09 18:41:25,218 INFO L78 Accepts]: Start accepts. Automaton has 12667 states and 48755 transitions. Word has length 28 [2021-07-09 18:41:25,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:25,218 INFO L482 AbstractCegarLoop]: Abstraction has 12667 states and 48755 transitions. [2021-07-09 18:41:25,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:25,218 INFO L276 IsEmpty]: Start isEmpty. Operand 12667 states and 48755 transitions. [2021-07-09 18:41:25,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:25,242 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:25,242 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:25,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4119,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:25,442 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:25,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:25,443 INFO L82 PathProgramCache]: Analyzing trace with hash -362417666, now seen corresponding path program 75 times [2021-07-09 18:41:25,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:25,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988529878] [2021-07-09 18:41:25,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:25,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:25,474 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:25,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:25,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988529878] [2021-07-09 18:41:25,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988529878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:25,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725422014] [2021-07-09 18:41:25,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:25,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:41:25,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:25,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:25,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:25,570 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:25,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725422014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:25,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:25,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-09 18:41:25,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193233304] [2021-07-09 18:41:25,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:41:25,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:25,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:41:25,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:41:25,571 INFO L87 Difference]: Start difference. First operand 12667 states and 48755 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:26,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:26,439 INFO L93 Difference]: Finished difference Result 22039 states and 80934 transitions. [2021-07-09 18:41:26,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-09 18:41:26,439 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:41:26,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:26,495 INFO L225 Difference]: With dead ends: 22039 [2021-07-09 18:41:26,496 INFO L226 Difference]: Without dead ends: 22035 [2021-07-09 18:41:26,496 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 483.7ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:41:26,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22035 states. [2021-07-09 18:41:26,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22035 to 12921. [2021-07-09 18:41:26,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12921 states, 12920 states have (on average 3.8388544891640866) internal successors, (49598), 12920 states have internal predecessors, (49598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:26,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12921 states to 12921 states and 49598 transitions. [2021-07-09 18:41:26,887 INFO L78 Accepts]: Start accepts. Automaton has 12921 states and 49598 transitions. Word has length 28 [2021-07-09 18:41:26,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:26,887 INFO L482 AbstractCegarLoop]: Abstraction has 12921 states and 49598 transitions. [2021-07-09 18:41:26,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:26,887 INFO L276 IsEmpty]: Start isEmpty. Operand 12921 states and 49598 transitions. [2021-07-09 18:41:26,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:26,910 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:26,910 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:27,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4120,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:27,110 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:27,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:27,110 INFO L82 PathProgramCache]: Analyzing trace with hash 502966272, now seen corresponding path program 112 times [2021-07-09 18:41:27,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:27,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269315430] [2021-07-09 18:41:27,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:27,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:27,139 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:27,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:27,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269315430] [2021-07-09 18:41:27,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269315430] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:27,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64575696] [2021-07-09 18:41:27,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:27,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:41:27,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:27,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:41:27,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:27,311 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:27,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64575696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:27,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:27,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:41:27,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921051401] [2021-07-09 18:41:27,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:41:27,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:27,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:41:27,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:41:27,312 INFO L87 Difference]: Start difference. First operand 12921 states and 49598 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:27,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:27,909 INFO L93 Difference]: Finished difference Result 18745 states and 68634 transitions. [2021-07-09 18:41:27,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:41:27,910 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:41:27,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:27,957 INFO L225 Difference]: With dead ends: 18745 [2021-07-09 18:41:27,957 INFO L226 Difference]: Without dead ends: 18722 [2021-07-09 18:41:27,957 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 304.2ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:41:27,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18722 states. [2021-07-09 18:41:28,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18722 to 13216. [2021-07-09 18:41:28,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13216 states, 13215 states have (on average 3.855996973136587) internal successors, (50957), 13215 states have internal predecessors, (50957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:28,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13216 states to 13216 states and 50957 transitions. [2021-07-09 18:41:28,272 INFO L78 Accepts]: Start accepts. Automaton has 13216 states and 50957 transitions. Word has length 28 [2021-07-09 18:41:28,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:28,272 INFO L482 AbstractCegarLoop]: Abstraction has 13216 states and 50957 transitions. [2021-07-09 18:41:28,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:28,272 INFO L276 IsEmpty]: Start isEmpty. Operand 13216 states and 50957 transitions. [2021-07-09 18:41:28,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:28,294 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:28,294 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:28,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4121 [2021-07-09 18:41:28,495 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:28,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:28,495 INFO L82 PathProgramCache]: Analyzing trace with hash -179778058, now seen corresponding path program 113 times [2021-07-09 18:41:28,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:28,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809368312] [2021-07-09 18:41:28,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:28,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:28,524 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:28,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:28,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809368312] [2021-07-09 18:41:28,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809368312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:28,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751953513] [2021-07-09 18:41:28,524 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:28,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:41:28,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:28,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:41:28,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:28,613 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:28,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751953513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:28,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:28,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:41:28,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371846874] [2021-07-09 18:41:28,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:41:28,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:28,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:41:28,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:41:28,614 INFO L87 Difference]: Start difference. First operand 13216 states and 50957 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:29,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:29,279 INFO L93 Difference]: Finished difference Result 18738 states and 67728 transitions. [2021-07-09 18:41:29,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:41:29,279 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:41:29,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:29,328 INFO L225 Difference]: With dead ends: 18738 [2021-07-09 18:41:29,328 INFO L226 Difference]: Without dead ends: 18738 [2021-07-09 18:41:29,328 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 376.5ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:41:29,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18738 states. [2021-07-09 18:41:29,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18738 to 13171. [2021-07-09 18:41:29,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13171 states, 13170 states have (on average 3.847835990888383) internal successors, (50676), 13170 states have internal predecessors, (50676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:29,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13171 states to 13171 states and 50676 transitions. [2021-07-09 18:41:29,760 INFO L78 Accepts]: Start accepts. Automaton has 13171 states and 50676 transitions. Word has length 28 [2021-07-09 18:41:29,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:29,761 INFO L482 AbstractCegarLoop]: Abstraction has 13171 states and 50676 transitions. [2021-07-09 18:41:29,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:29,761 INFO L276 IsEmpty]: Start isEmpty. Operand 13171 states and 50676 transitions. [2021-07-09 18:41:29,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:29,782 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:29,783 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:29,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4122,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:29,983 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:29,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:29,984 INFO L82 PathProgramCache]: Analyzing trace with hash -499896522, now seen corresponding path program 114 times [2021-07-09 18:41:29,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:29,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755874899] [2021-07-09 18:41:29,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:29,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:30,013 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:30,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:30,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755874899] [2021-07-09 18:41:30,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755874899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:30,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510717110] [2021-07-09 18:41:30,013 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:30,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:41:30,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:30,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:41:30,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:30,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:30,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510717110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:30,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:30,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:41:30,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102215065] [2021-07-09 18:41:30,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:41:30,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:30,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:41:30,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:41:30,104 INFO L87 Difference]: Start difference. First operand 13171 states and 50676 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:30,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:30,725 INFO L93 Difference]: Finished difference Result 20089 states and 73010 transitions. [2021-07-09 18:41:30,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:41:30,725 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:41:30,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:30,772 INFO L225 Difference]: With dead ends: 20089 [2021-07-09 18:41:30,773 INFO L226 Difference]: Without dead ends: 20089 [2021-07-09 18:41:30,773 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 332.3ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:41:30,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20089 states. [2021-07-09 18:41:31,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20089 to 13878. [2021-07-09 18:41:31,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13878 states, 13877 states have (on average 3.834186063270159) internal successors, (53207), 13877 states have internal predecessors, (53207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:31,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13878 states to 13878 states and 53207 transitions. [2021-07-09 18:41:31,115 INFO L78 Accepts]: Start accepts. Automaton has 13878 states and 53207 transitions. Word has length 28 [2021-07-09 18:41:31,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:31,115 INFO L482 AbstractCegarLoop]: Abstraction has 13878 states and 53207 transitions. [2021-07-09 18:41:31,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:31,115 INFO L276 IsEmpty]: Start isEmpty. Operand 13878 states and 53207 transitions. [2021-07-09 18:41:31,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:31,140 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:31,140 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:31,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4123 [2021-07-09 18:41:31,345 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:31,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:31,345 INFO L82 PathProgramCache]: Analyzing trace with hash 389506442, now seen corresponding path program 115 times [2021-07-09 18:41:31,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:31,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296729073] [2021-07-09 18:41:31,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:31,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:31,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:31,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:31,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296729073] [2021-07-09 18:41:31,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296729073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:31,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141899575] [2021-07-09 18:41:31,375 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:31,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:31,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:41:31,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:31,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:31,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141899575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:31,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:31,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 18:41:31,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669543421] [2021-07-09 18:41:31,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:41:31,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:31,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:41:31,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:41:31,470 INFO L87 Difference]: Start difference. First operand 13878 states and 53207 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:32,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:32,238 INFO L93 Difference]: Finished difference Result 22502 states and 80640 transitions. [2021-07-09 18:41:32,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:41:32,239 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:41:32,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:32,293 INFO L225 Difference]: With dead ends: 22502 [2021-07-09 18:41:32,293 INFO L226 Difference]: Without dead ends: 22502 [2021-07-09 18:41:32,293 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 431.6ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:41:32,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22502 states. [2021-07-09 18:41:32,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22502 to 14104. [2021-07-09 18:41:32,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14104 states, 14103 states have (on average 3.8464156562433525) internal successors, (54246), 14103 states have internal predecessors, (54246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:32,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14104 states to 14104 states and 54246 transitions. [2021-07-09 18:41:32,703 INFO L78 Accepts]: Start accepts. Automaton has 14104 states and 54246 transitions. Word has length 28 [2021-07-09 18:41:32,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:32,703 INFO L482 AbstractCegarLoop]: Abstraction has 14104 states and 54246 transitions. [2021-07-09 18:41:32,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:32,704 INFO L276 IsEmpty]: Start isEmpty. Operand 14104 states and 54246 transitions. [2021-07-09 18:41:32,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:32,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:32,727 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:32,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4124,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:32,928 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:32,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:32,928 INFO L82 PathProgramCache]: Analyzing trace with hash -933026596, now seen corresponding path program 76 times [2021-07-09 18:41:32,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:32,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860429873] [2021-07-09 18:41:32,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:32,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:32,960 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:32,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:32,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860429873] [2021-07-09 18:41:32,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860429873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:32,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207689794] [2021-07-09 18:41:32,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:32,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:41:32,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:32,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:32,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:33,077 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:33,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207689794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:33,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:33,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:41:33,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581424787] [2021-07-09 18:41:33,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:41:33,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:33,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:41:33,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:41:33,077 INFO L87 Difference]: Start difference. First operand 14104 states and 54246 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:34,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:34,478 INFO L93 Difference]: Finished difference Result 39134 states and 140671 transitions. [2021-07-09 18:41:34,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-09 18:41:34,478 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:41:34,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:34,595 INFO L225 Difference]: With dead ends: 39134 [2021-07-09 18:41:34,595 INFO L226 Difference]: Without dead ends: 39134 [2021-07-09 18:41:34,596 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 816.9ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-07-09 18:41:34,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39134 states. [2021-07-09 18:41:35,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39134 to 15340. [2021-07-09 18:41:35,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15340 states, 15339 states have (on average 3.892887411174131) internal successors, (59713), 15339 states have internal predecessors, (59713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:35,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15340 states to 15340 states and 59713 transitions. [2021-07-09 18:41:35,346 INFO L78 Accepts]: Start accepts. Automaton has 15340 states and 59713 transitions. Word has length 28 [2021-07-09 18:41:35,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:35,346 INFO L482 AbstractCegarLoop]: Abstraction has 15340 states and 59713 transitions. [2021-07-09 18:41:35,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:35,346 INFO L276 IsEmpty]: Start isEmpty. Operand 15340 states and 59713 transitions. [2021-07-09 18:41:35,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:35,375 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:35,375 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:35,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4125,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:35,576 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:35,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:35,576 INFO L82 PathProgramCache]: Analyzing trace with hash -366074516, now seen corresponding path program 77 times [2021-07-09 18:41:35,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:35,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711510941] [2021-07-09 18:41:35,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:35,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:35,610 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:35,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:35,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711510941] [2021-07-09 18:41:35,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711510941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:35,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361818241] [2021-07-09 18:41:35,611 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:35,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:41:35,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:35,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:35,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:35,737 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:35,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361818241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:35,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:35,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:41:35,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401307721] [2021-07-09 18:41:35,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:41:35,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:35,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:41:35,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:41:35,738 INFO L87 Difference]: Start difference. First operand 15340 states and 59713 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:37,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:37,119 INFO L93 Difference]: Finished difference Result 38160 states and 138109 transitions. [2021-07-09 18:41:37,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-09 18:41:37,119 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:41:37,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:37,225 INFO L225 Difference]: With dead ends: 38160 [2021-07-09 18:41:37,225 INFO L226 Difference]: Without dead ends: 38160 [2021-07-09 18:41:37,226 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 821.9ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-07-09 18:41:37,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38160 states. [2021-07-09 18:41:37,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38160 to 15314. [2021-07-09 18:41:37,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15314 states, 15313 states have (on average 3.88930973682492) internal successors, (59557), 15313 states have internal predecessors, (59557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:37,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15314 states to 15314 states and 59557 transitions. [2021-07-09 18:41:37,956 INFO L78 Accepts]: Start accepts. Automaton has 15314 states and 59557 transitions. Word has length 28 [2021-07-09 18:41:37,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:37,956 INFO L482 AbstractCegarLoop]: Abstraction has 15314 states and 59557 transitions. [2021-07-09 18:41:37,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:37,956 INFO L276 IsEmpty]: Start isEmpty. Operand 15314 states and 59557 transitions. [2021-07-09 18:41:37,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:37,981 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:37,981 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:38,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4126,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:38,181 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:38,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:38,181 INFO L82 PathProgramCache]: Analyzing trace with hash -648300864, now seen corresponding path program 116 times [2021-07-09 18:41:38,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:38,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017340929] [2021-07-09 18:41:38,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:38,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:38,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:38,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:38,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017340929] [2021-07-09 18:41:38,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017340929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:38,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755729240] [2021-07-09 18:41:38,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:38,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:38,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:38,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:41:38,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:38,285 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:38,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755729240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:38,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:38,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:41:38,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814816501] [2021-07-09 18:41:38,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:41:38,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:38,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:41:38,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:41:38,286 INFO L87 Difference]: Start difference. First operand 15314 states and 59557 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:38,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:38,541 INFO L93 Difference]: Finished difference Result 23675 states and 90680 transitions. [2021-07-09 18:41:38,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:41:38,541 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:41:38,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:38,603 INFO L225 Difference]: With dead ends: 23675 [2021-07-09 18:41:38,603 INFO L226 Difference]: Without dead ends: 23628 [2021-07-09 18:41:38,603 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 94.8ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:41:38,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23628 states. [2021-07-09 18:41:38,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23628 to 20433. [2021-07-09 18:41:38,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20433 states, 20432 states have (on average 3.903680501174628) internal successors, (79760), 20432 states have internal predecessors, (79760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:39,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20433 states to 20433 states and 79760 transitions. [2021-07-09 18:41:39,046 INFO L78 Accepts]: Start accepts. Automaton has 20433 states and 79760 transitions. Word has length 28 [2021-07-09 18:41:39,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:39,046 INFO L482 AbstractCegarLoop]: Abstraction has 20433 states and 79760 transitions. [2021-07-09 18:41:39,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:39,046 INFO L276 IsEmpty]: Start isEmpty. Operand 20433 states and 79760 transitions. [2021-07-09 18:41:39,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:39,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:39,083 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:39,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4127,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:39,284 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:39,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:39,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1261765878, now seen corresponding path program 117 times [2021-07-09 18:41:39,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:39,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900904744] [2021-07-09 18:41:39,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:39,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:39,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:39,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:39,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900904744] [2021-07-09 18:41:39,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900904744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:39,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403250818] [2021-07-09 18:41:39,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:39,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:41:39,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:39,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:41:39,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:39,386 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:39,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403250818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:39,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:39,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:41:39,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268556655] [2021-07-09 18:41:39,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:41:39,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:39,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:41:39,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:41:39,387 INFO L87 Difference]: Start difference. First operand 20433 states and 79760 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:39,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:39,632 INFO L93 Difference]: Finished difference Result 23187 states and 88130 transitions. [2021-07-09 18:41:39,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:41:39,633 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:41:39,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:39,690 INFO L225 Difference]: With dead ends: 23187 [2021-07-09 18:41:39,690 INFO L226 Difference]: Without dead ends: 23187 [2021-07-09 18:41:39,691 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 87.2ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:41:39,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23187 states. [2021-07-09 18:41:40,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23187 to 19936. [2021-07-09 18:41:40,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19936 states, 19935 states have (on average 3.89204915976925) internal successors, (77588), 19935 states have internal predecessors, (77588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:40,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19936 states to 19936 states and 77588 transitions. [2021-07-09 18:41:40,291 INFO L78 Accepts]: Start accepts. Automaton has 19936 states and 77588 transitions. Word has length 28 [2021-07-09 18:41:40,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:40,291 INFO L482 AbstractCegarLoop]: Abstraction has 19936 states and 77588 transitions. [2021-07-09 18:41:40,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:40,291 INFO L276 IsEmpty]: Start isEmpty. Operand 19936 states and 77588 transitions. [2021-07-09 18:41:40,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:40,325 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:40,325 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:40,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4128 [2021-07-09 18:41:40,526 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:40,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:40,526 INFO L82 PathProgramCache]: Analyzing trace with hash 310084440, now seen corresponding path program 118 times [2021-07-09 18:41:40,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:40,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638468989] [2021-07-09 18:41:40,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:40,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:40,568 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:40,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:40,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638468989] [2021-07-09 18:41:40,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638468989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:40,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563665075] [2021-07-09 18:41:40,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:40,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:41:40,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:40,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:40,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:40,672 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:40,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563665075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:40,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:40,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-09 18:41:40,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899324999] [2021-07-09 18:41:40,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:41:40,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:40,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:41:40,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:41:40,673 INFO L87 Difference]: Start difference. First operand 19936 states and 77588 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:41,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:41,596 INFO L93 Difference]: Finished difference Result 31776 states and 117695 transitions. [2021-07-09 18:41:41,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:41:41,596 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:41:41,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:41,684 INFO L225 Difference]: With dead ends: 31776 [2021-07-09 18:41:41,684 INFO L226 Difference]: Without dead ends: 31776 [2021-07-09 18:41:41,684 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 458.0ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:41:41,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31776 states. [2021-07-09 18:41:42,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31776 to 20002. [2021-07-09 18:41:42,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20002 states, 20001 states have (on average 3.8901054947252636) internal successors, (77806), 20001 states have internal predecessors, (77806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:42,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20002 states to 20002 states and 77806 transitions. [2021-07-09 18:41:42,229 INFO L78 Accepts]: Start accepts. Automaton has 20002 states and 77806 transitions. Word has length 28 [2021-07-09 18:41:42,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:42,229 INFO L482 AbstractCegarLoop]: Abstraction has 20002 states and 77806 transitions. [2021-07-09 18:41:42,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:42,229 INFO L276 IsEmpty]: Start isEmpty. Operand 20002 states and 77806 transitions. [2021-07-09 18:41:42,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:42,262 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:42,262 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:42,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4129,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:42,462 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:42,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:42,462 INFO L82 PathProgramCache]: Analyzing trace with hash -666234404, now seen corresponding path program 119 times [2021-07-09 18:41:42,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:42,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791551972] [2021-07-09 18:41:42,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:42,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:42,497 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:42,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:42,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791551972] [2021-07-09 18:41:42,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791551972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:42,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356287899] [2021-07-09 18:41:42,497 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:42,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:41:42,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:42,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:42,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:42,607 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:42,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356287899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:42,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:42,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 18:41:42,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849675200] [2021-07-09 18:41:42,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:41:42,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:42,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:41:42,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:41:42,608 INFO L87 Difference]: Start difference. First operand 20002 states and 77806 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:44,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:44,047 INFO L93 Difference]: Finished difference Result 40610 states and 148783 transitions. [2021-07-09 18:41:44,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-07-09 18:41:44,047 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:41:44,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:44,170 INFO L225 Difference]: With dead ends: 40610 [2021-07-09 18:41:44,170 INFO L226 Difference]: Without dead ends: 40610 [2021-07-09 18:41:44,171 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 800.5ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-07-09 18:41:44,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40610 states. [2021-07-09 18:41:44,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40610 to 20007. [2021-07-09 18:41:44,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20007 states, 20006 states have (on average 3.892182345296411) internal successors, (77867), 20006 states have internal predecessors, (77867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:44,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20007 states to 20007 states and 77867 transitions. [2021-07-09 18:41:44,844 INFO L78 Accepts]: Start accepts. Automaton has 20007 states and 77867 transitions. Word has length 28 [2021-07-09 18:41:44,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:44,844 INFO L482 AbstractCegarLoop]: Abstraction has 20007 states and 77867 transitions. [2021-07-09 18:41:44,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:44,844 INFO L276 IsEmpty]: Start isEmpty. Operand 20007 states and 77867 transitions. [2021-07-09 18:41:44,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:44,877 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:44,877 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:45,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4130 [2021-07-09 18:41:45,078 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:45,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:45,078 INFO L82 PathProgramCache]: Analyzing trace with hash -99282324, now seen corresponding path program 120 times [2021-07-09 18:41:45,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:45,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022358803] [2021-07-09 18:41:45,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:45,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:45,112 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:45,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:45,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022358803] [2021-07-09 18:41:45,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022358803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:45,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728337200] [2021-07-09 18:41:45,113 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:45,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:41:45,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:45,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:45,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:45,225 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:45,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728337200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:45,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:45,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 18:41:45,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168599912] [2021-07-09 18:41:45,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:41:45,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:45,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:41:45,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:41:45,226 INFO L87 Difference]: Start difference. First operand 20007 states and 77867 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:46,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:46,635 INFO L93 Difference]: Finished difference Result 40173 states and 147928 transitions. [2021-07-09 18:41:46,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-09 18:41:46,636 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:41:46,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:46,759 INFO L225 Difference]: With dead ends: 40173 [2021-07-09 18:41:46,759 INFO L226 Difference]: Without dead ends: 40173 [2021-07-09 18:41:46,759 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 790.8ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-07-09 18:41:46,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40173 states. [2021-07-09 18:41:47,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40173 to 19795. [2021-07-09 18:41:47,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19795 states, 19794 states have (on average 3.884308376275639) internal successors, (76886), 19794 states have internal predecessors, (76886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:47,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19795 states to 19795 states and 76886 transitions. [2021-07-09 18:41:47,440 INFO L78 Accepts]: Start accepts. Automaton has 19795 states and 76886 transitions. Word has length 28 [2021-07-09 18:41:47,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:47,440 INFO L482 AbstractCegarLoop]: Abstraction has 19795 states and 76886 transitions. [2021-07-09 18:41:47,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:47,440 INFO L276 IsEmpty]: Start isEmpty. Operand 19795 states and 76886 transitions. [2021-07-09 18:41:47,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:47,474 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:47,474 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:47,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4131 [2021-07-09 18:41:47,674 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:47,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:47,675 INFO L82 PathProgramCache]: Analyzing trace with hash 836856348, now seen corresponding path program 121 times [2021-07-09 18:41:47,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:47,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343131416] [2021-07-09 18:41:47,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:47,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:47,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:47,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:47,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343131416] [2021-07-09 18:41:47,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343131416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:47,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625883148] [2021-07-09 18:41:47,701 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:47,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:47,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:47,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:47,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:41:47,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625883148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:47,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:47,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-09 18:41:47,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428240686] [2021-07-09 18:41:47,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:41:47,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:47,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:41:47,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:41:47,776 INFO L87 Difference]: Start difference. First operand 19795 states and 76886 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:48,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:48,057 INFO L93 Difference]: Finished difference Result 29286 states and 109348 transitions. [2021-07-09 18:41:48,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:41:48,058 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:41:48,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:48,144 INFO L225 Difference]: With dead ends: 29286 [2021-07-09 18:41:48,144 INFO L226 Difference]: Without dead ends: 29269 [2021-07-09 18:41:48,144 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 94.8ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:41:48,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29269 states. [2021-07-09 18:41:48,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29269 to 20063. [2021-07-09 18:41:48,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20063 states, 20062 states have (on average 3.8898414913767323) internal successors, (78038), 20062 states have internal predecessors, (78038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:48,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20063 states to 20063 states and 78038 transitions. [2021-07-09 18:41:48,799 INFO L78 Accepts]: Start accepts. Automaton has 20063 states and 78038 transitions. Word has length 28 [2021-07-09 18:41:48,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:48,799 INFO L482 AbstractCegarLoop]: Abstraction has 20063 states and 78038 transitions. [2021-07-09 18:41:48,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:48,799 INFO L276 IsEmpty]: Start isEmpty. Operand 20063 states and 78038 transitions. [2021-07-09 18:41:48,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:48,834 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:48,835 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:49,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4132,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:49,035 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:49,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:49,035 INFO L82 PathProgramCache]: Analyzing trace with hash -306069692, now seen corresponding path program 122 times [2021-07-09 18:41:49,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:49,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300492457] [2021-07-09 18:41:49,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:49,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:49,071 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:49,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:49,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300492457] [2021-07-09 18:41:49,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300492457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:49,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122114266] [2021-07-09 18:41:49,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:49,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:49,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:49,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:49,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:49,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:41:49,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122114266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:49,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:49,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-09 18:41:49,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072331243] [2021-07-09 18:41:49,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:41:49,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:49,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:41:49,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:41:49,149 INFO L87 Difference]: Start difference. First operand 20063 states and 78038 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:49,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:49,443 INFO L93 Difference]: Finished difference Result 31067 states and 114897 transitions. [2021-07-09 18:41:49,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:41:49,443 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:41:49,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:49,535 INFO L225 Difference]: With dead ends: 31067 [2021-07-09 18:41:49,535 INFO L226 Difference]: Without dead ends: 31067 [2021-07-09 18:41:49,535 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 107.2ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:41:49,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31067 states. [2021-07-09 18:41:49,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31067 to 19732. [2021-07-09 18:41:50,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19732 states, 19731 states have (on average 3.874714915615022) internal successors, (76452), 19731 states have internal predecessors, (76452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:50,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19732 states to 19732 states and 76452 transitions. [2021-07-09 18:41:50,064 INFO L78 Accepts]: Start accepts. Automaton has 19732 states and 76452 transitions. Word has length 28 [2021-07-09 18:41:50,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:50,064 INFO L482 AbstractCegarLoop]: Abstraction has 19732 states and 76452 transitions. [2021-07-09 18:41:50,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:50,065 INFO L276 IsEmpty]: Start isEmpty. Operand 19732 states and 76452 transitions. [2021-07-09 18:41:50,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:50,099 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:50,099 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:50,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4133 [2021-07-09 18:41:50,299 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:50,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:50,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1652751258, now seen corresponding path program 123 times [2021-07-09 18:41:50,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:50,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155677499] [2021-07-09 18:41:50,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:50,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:50,340 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:50,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:50,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155677499] [2021-07-09 18:41:50,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155677499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:50,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216415949] [2021-07-09 18:41:50,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:50,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:41:50,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:50,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:50,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:50,454 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:50,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216415949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:50,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:50,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-09 18:41:50,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755016586] [2021-07-09 18:41:50,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:41:50,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:50,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:41:50,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:41:50,454 INFO L87 Difference]: Start difference. First operand 19732 states and 76452 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:51,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:51,245 INFO L93 Difference]: Finished difference Result 29306 states and 108910 transitions. [2021-07-09 18:41:51,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 18:41:51,245 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:41:51,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:51,334 INFO L225 Difference]: With dead ends: 29306 [2021-07-09 18:41:51,334 INFO L226 Difference]: Without dead ends: 29306 [2021-07-09 18:41:51,335 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 380.9ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:41:51,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29306 states. [2021-07-09 18:41:51,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29306 to 19780. [2021-07-09 18:41:51,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19780 states, 19779 states have (on average 3.8734010819556093) internal successors, (76612), 19779 states have internal predecessors, (76612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:52,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19780 states to 19780 states and 76612 transitions. [2021-07-09 18:41:52,023 INFO L78 Accepts]: Start accepts. Automaton has 19780 states and 76612 transitions. Word has length 28 [2021-07-09 18:41:52,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:52,024 INFO L482 AbstractCegarLoop]: Abstraction has 19780 states and 76612 transitions. [2021-07-09 18:41:52,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:52,024 INFO L276 IsEmpty]: Start isEmpty. Operand 19780 states and 76612 transitions. [2021-07-09 18:41:52,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:52,058 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:52,058 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:52,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4134 [2021-07-09 18:41:52,259 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:52,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:52,259 INFO L82 PathProgramCache]: Analyzing trace with hash -867837164, now seen corresponding path program 124 times [2021-07-09 18:41:52,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:52,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996639315] [2021-07-09 18:41:52,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:52,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:52,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:52,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996639315] [2021-07-09 18:41:52,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996639315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:52,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799356841] [2021-07-09 18:41:52,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:52,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:41:52,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:52,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:52,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:52,384 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:52,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799356841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:52,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:52,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-09 18:41:52,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328142811] [2021-07-09 18:41:52,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:41:52,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:52,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:41:52,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:41:52,385 INFO L87 Difference]: Start difference. First operand 19780 states and 76612 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:53,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:53,330 INFO L93 Difference]: Finished difference Result 30838 states and 113300 transitions. [2021-07-09 18:41:53,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-09 18:41:53,330 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:41:53,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:53,421 INFO L225 Difference]: With dead ends: 30838 [2021-07-09 18:41:53,421 INFO L226 Difference]: Without dead ends: 30838 [2021-07-09 18:41:53,422 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 514.2ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:41:53,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30838 states. [2021-07-09 18:41:53,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30838 to 20326. [2021-07-09 18:41:53,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20326 states, 20325 states have (on average 3.8521525215252153) internal successors, (78295), 20325 states have internal predecessors, (78295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:54,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20326 states to 20326 states and 78295 transitions. [2021-07-09 18:41:54,018 INFO L78 Accepts]: Start accepts. Automaton has 20326 states and 78295 transitions. Word has length 28 [2021-07-09 18:41:54,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:54,018 INFO L482 AbstractCegarLoop]: Abstraction has 20326 states and 78295 transitions. [2021-07-09 18:41:54,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:54,018 INFO L276 IsEmpty]: Start isEmpty. Operand 20326 states and 78295 transitions. [2021-07-09 18:41:54,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:54,054 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:54,054 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:54,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4135,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:54,255 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:54,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:54,255 INFO L82 PathProgramCache]: Analyzing trace with hash -912658306, now seen corresponding path program 125 times [2021-07-09 18:41:54,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:54,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933964108] [2021-07-09 18:41:54,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:54,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:54,288 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:54,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:54,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933964108] [2021-07-09 18:41:54,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933964108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:54,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338818765] [2021-07-09 18:41:54,289 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:54,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:41:54,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:54,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:54,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:54,503 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:54,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338818765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:54,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:54,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-09 18:41:54,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124519372] [2021-07-09 18:41:54,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:41:54,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:54,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:41:54,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:41:54,504 INFO L87 Difference]: Start difference. First operand 20326 states and 78295 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:55,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:55,335 INFO L93 Difference]: Finished difference Result 29955 states and 110977 transitions. [2021-07-09 18:41:55,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 18:41:55,335 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:41:55,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:55,423 INFO L225 Difference]: With dead ends: 29955 [2021-07-09 18:41:55,423 INFO L226 Difference]: Without dead ends: 29951 [2021-07-09 18:41:55,424 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 540.7ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:41:55,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29951 states. [2021-07-09 18:41:55,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29951 to 20218. [2021-07-09 18:41:55,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20218 states, 20217 states have (on average 3.854825147153386) internal successors, (77933), 20217 states have internal predecessors, (77933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:55,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20218 states to 20218 states and 77933 transitions. [2021-07-09 18:41:55,998 INFO L78 Accepts]: Start accepts. Automaton has 20218 states and 77933 transitions. Word has length 28 [2021-07-09 18:41:55,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:55,998 INFO L482 AbstractCegarLoop]: Abstraction has 20218 states and 77933 transitions. [2021-07-09 18:41:55,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:55,998 INFO L276 IsEmpty]: Start isEmpty. Operand 20218 states and 77933 transitions. [2021-07-09 18:41:56,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:56,033 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:56,033 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:56,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4136,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:56,234 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:56,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:56,234 INFO L82 PathProgramCache]: Analyzing trace with hash -47274368, now seen corresponding path program 126 times [2021-07-09 18:41:56,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:56,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614324152] [2021-07-09 18:41:56,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:56,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:56,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:56,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:56,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614324152] [2021-07-09 18:41:56,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614324152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:56,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361177945] [2021-07-09 18:41:56,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:56,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:41:56,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:56,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:56,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:56,332 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 18:41:56,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361177945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:56,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:56,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-07-09 18:41:56,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645120640] [2021-07-09 18:41:56,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:41:56,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:56,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:41:56,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:41:56,333 INFO L87 Difference]: Start difference. First operand 20218 states and 77933 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:56,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:56,565 INFO L93 Difference]: Finished difference Result 25214 states and 93817 transitions. [2021-07-09 18:41:56,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:41:56,565 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:41:56,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:56,638 INFO L225 Difference]: With dead ends: 25214 [2021-07-09 18:41:56,638 INFO L226 Difference]: Without dead ends: 25214 [2021-07-09 18:41:56,638 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 89.4ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:41:56,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25214 states. [2021-07-09 18:41:57,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25214 to 20528. [2021-07-09 18:41:57,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20528 states, 20527 states have (on average 3.8459589808544843) internal successors, (78946), 20527 states have internal predecessors, (78946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:57,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20528 states to 20528 states and 78946 transitions. [2021-07-09 18:41:57,259 INFO L78 Accepts]: Start accepts. Automaton has 20528 states and 78946 transitions. Word has length 28 [2021-07-09 18:41:57,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:57,260 INFO L482 AbstractCegarLoop]: Abstraction has 20528 states and 78946 transitions. [2021-07-09 18:41:57,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:57,260 INFO L276 IsEmpty]: Start isEmpty. Operand 20528 states and 78946 transitions. [2021-07-09 18:41:57,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:57,296 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:57,296 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:57,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4137,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:57,496 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:57,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:57,497 INFO L82 PathProgramCache]: Analyzing trace with hash 882925376, now seen corresponding path program 127 times [2021-07-09 18:41:57,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:57,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509481374] [2021-07-09 18:41:57,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:57,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:57,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:57,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509481374] [2021-07-09 18:41:57,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509481374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:57,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395043041] [2021-07-09 18:41:57,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:57,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:57,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:57,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:57,610 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:41:57,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395043041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:57,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:57,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-09 18:41:57,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187128138] [2021-07-09 18:41:57,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:41:57,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:57,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:41:57,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:41:57,611 INFO L87 Difference]: Start difference. First operand 20528 states and 78946 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:58,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:58,371 INFO L93 Difference]: Finished difference Result 30964 states and 113417 transitions. [2021-07-09 18:41:58,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:41:58,371 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:41:58,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:58,464 INFO L225 Difference]: With dead ends: 30964 [2021-07-09 18:41:58,464 INFO L226 Difference]: Without dead ends: 30964 [2021-07-09 18:41:58,465 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 398.4ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:41:58,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30964 states. [2021-07-09 18:41:58,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30964 to 22146. [2021-07-09 18:41:58,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22146 states, 22145 states have (on average 3.8581169564235718) internal successors, (85438), 22145 states have internal predecessors, (85438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:59,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22146 states to 22146 states and 85438 transitions. [2021-07-09 18:41:59,065 INFO L78 Accepts]: Start accepts. Automaton has 22146 states and 85438 transitions. Word has length 28 [2021-07-09 18:41:59,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:59,065 INFO L482 AbstractCegarLoop]: Abstraction has 22146 states and 85438 transitions. [2021-07-09 18:41:59,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:59,065 INFO L276 IsEmpty]: Start isEmpty. Operand 22146 states and 85438 transitions. [2021-07-09 18:41:59,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:59,104 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:59,104 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:59,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4138,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:59,304 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:59,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:59,304 INFO L82 PathProgramCache]: Analyzing trace with hash -956846952, now seen corresponding path program 128 times [2021-07-09 18:41:59,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:59,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611776929] [2021-07-09 18:41:59,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:59,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:59,338 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:59,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:59,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611776929] [2021-07-09 18:41:59,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611776929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:59,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405834582] [2021-07-09 18:41:59,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:59,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:59,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:59,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:59,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:59,415 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:41:59,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405834582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:59,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:59,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-09 18:41:59,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999414297] [2021-07-09 18:41:59,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:41:59,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:59,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:41:59,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:41:59,416 INFO L87 Difference]: Start difference. First operand 22146 states and 85438 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:00,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:00,083 INFO L93 Difference]: Finished difference Result 29203 states and 108883 transitions. [2021-07-09 18:42:00,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:42:00,083 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:42:00,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:00,171 INFO L225 Difference]: With dead ends: 29203 [2021-07-09 18:42:00,171 INFO L226 Difference]: Without dead ends: 29191 [2021-07-09 18:42:00,172 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 329.0ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:42:00,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29191 states. [2021-07-09 18:42:00,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29191 to 22298. [2021-07-09 18:42:00,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22298 states, 22297 states have (on average 3.8527156119657353) internal successors, (85904), 22297 states have internal predecessors, (85904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:00,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22298 states to 22298 states and 85904 transitions. [2021-07-09 18:42:00,849 INFO L78 Accepts]: Start accepts. Automaton has 22298 states and 85904 transitions. Word has length 28 [2021-07-09 18:42:00,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:00,849 INFO L482 AbstractCegarLoop]: Abstraction has 22298 states and 85904 transitions. [2021-07-09 18:42:00,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:00,849 INFO L276 IsEmpty]: Start isEmpty. Operand 22298 states and 85904 transitions. [2021-07-09 18:42:00,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:00,889 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:00,889 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:01,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4139,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:01,090 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:01,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:01,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1587630268, now seen corresponding path program 129 times [2021-07-09 18:42:01,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:01,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328257823] [2021-07-09 18:42:01,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:01,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:01,117 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:42:01,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:01,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328257823] [2021-07-09 18:42:01,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328257823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:01,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817454328] [2021-07-09 18:42:01,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:01,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:42:01,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:01,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:42:01,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:01,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:42:01,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817454328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:01,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:01,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-09 18:42:01,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105257853] [2021-07-09 18:42:01,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:42:01,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:01,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:42:01,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:42:01,189 INFO L87 Difference]: Start difference. First operand 22298 states and 85904 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:01,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:01,447 INFO L93 Difference]: Finished difference Result 25557 states and 96861 transitions. [2021-07-09 18:42:01,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:42:01,448 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:42:01,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:01,525 INFO L225 Difference]: With dead ends: 25557 [2021-07-09 18:42:01,525 INFO L226 Difference]: Without dead ends: 25557 [2021-07-09 18:42:01,526 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:42:01,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25557 states. [2021-07-09 18:42:01,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25557 to 23101. [2021-07-09 18:42:01,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23101 states, 23100 states have (on average 3.847748917748918) internal successors, (88883), 23100 states have internal predecessors, (88883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:02,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23101 states to 23101 states and 88883 transitions. [2021-07-09 18:42:02,041 INFO L78 Accepts]: Start accepts. Automaton has 23101 states and 88883 transitions. Word has length 28 [2021-07-09 18:42:02,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:02,041 INFO L482 AbstractCegarLoop]: Abstraction has 23101 states and 88883 transitions. [2021-07-09 18:42:02,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:02,041 INFO L276 IsEmpty]: Start isEmpty. Operand 23101 states and 88883 transitions. [2021-07-09 18:42:02,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:02,081 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:02,081 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:02,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4140 [2021-07-09 18:42:02,282 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:02,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:02,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1143968700, now seen corresponding path program 130 times [2021-07-09 18:42:02,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:02,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715860009] [2021-07-09 18:42:02,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:02,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:02,317 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:02,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:02,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715860009] [2021-07-09 18:42:02,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715860009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:02,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172008558] [2021-07-09 18:42:02,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:02,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:42:02,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:02,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:02,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:02,399 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:02,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172008558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:02,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:02,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-09 18:42:02,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190838864] [2021-07-09 18:42:02,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:42:02,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:02,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:42:02,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:42:02,399 INFO L87 Difference]: Start difference. First operand 23101 states and 88883 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:03,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:03,134 INFO L93 Difference]: Finished difference Result 30944 states and 114247 transitions. [2021-07-09 18:42:03,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:42:03,134 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:42:03,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:03,357 INFO L225 Difference]: With dead ends: 30944 [2021-07-09 18:42:03,357 INFO L226 Difference]: Without dead ends: 30944 [2021-07-09 18:42:03,358 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 384.1ms TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:42:03,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30944 states. [2021-07-09 18:42:03,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30944 to 24307. [2021-07-09 18:42:03,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24307 states, 24306 states have (on average 3.8156010861515677) internal successors, (92742), 24306 states have internal predecessors, (92742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:03,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24307 states to 24307 states and 92742 transitions. [2021-07-09 18:42:03,991 INFO L78 Accepts]: Start accepts. Automaton has 24307 states and 92742 transitions. Word has length 28 [2021-07-09 18:42:03,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:03,991 INFO L482 AbstractCegarLoop]: Abstraction has 24307 states and 92742 transitions. [2021-07-09 18:42:03,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:03,991 INFO L276 IsEmpty]: Start isEmpty. Operand 24307 states and 92742 transitions. [2021-07-09 18:42:04,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:04,034 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:04,034 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:04,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4141 [2021-07-09 18:42:04,235 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:04,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:04,235 INFO L82 PathProgramCache]: Analyzing trace with hash -403875748, now seen corresponding path program 131 times [2021-07-09 18:42:04,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:04,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153182207] [2021-07-09 18:42:04,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:04,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:04,265 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:04,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:04,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153182207] [2021-07-09 18:42:04,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153182207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:04,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423989954] [2021-07-09 18:42:04,265 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:04,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:42:04,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:04,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:04,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:04,341 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:04,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423989954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:04,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:04,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:42:04,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591044045] [2021-07-09 18:42:04,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:42:04,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:04,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:42:04,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:42:04,342 INFO L87 Difference]: Start difference. First operand 24307 states and 92742 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:04,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:04,922 INFO L93 Difference]: Finished difference Result 30042 states and 111856 transitions. [2021-07-09 18:42:04,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:42:04,923 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:42:04,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:05,012 INFO L225 Difference]: With dead ends: 30042 [2021-07-09 18:42:05,013 INFO L226 Difference]: Without dead ends: 30034 [2021-07-09 18:42:05,013 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 264.9ms TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:42:05,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30034 states. [2021-07-09 18:42:05,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30034 to 24129. [2021-07-09 18:42:05,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24129 states, 24128 states have (on average 3.821742374005305) internal successors, (92211), 24128 states have internal predecessors, (92211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:05,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24129 states to 24129 states and 92211 transitions. [2021-07-09 18:42:05,626 INFO L78 Accepts]: Start accepts. Automaton has 24129 states and 92211 transitions. Word has length 28 [2021-07-09 18:42:05,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:05,626 INFO L482 AbstractCegarLoop]: Abstraction has 24129 states and 92211 transitions. [2021-07-09 18:42:05,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:05,627 INFO L276 IsEmpty]: Start isEmpty. Operand 24129 states and 92211 transitions. [2021-07-09 18:42:05,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:05,669 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:05,669 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:05,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4142 [2021-07-09 18:42:05,869 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:05,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:05,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1046121180, now seen corresponding path program 132 times [2021-07-09 18:42:05,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:05,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718237968] [2021-07-09 18:42:05,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:05,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:05,899 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:05,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:05,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718237968] [2021-07-09 18:42:05,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718237968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:05,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438976693] [2021-07-09 18:42:05,900 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:05,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:42:05,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:05,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:05,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:05,985 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:05,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438976693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:05,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:05,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:42:05,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355726962] [2021-07-09 18:42:05,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:42:05,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:05,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:42:05,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:42:05,986 INFO L87 Difference]: Start difference. First operand 24129 states and 92211 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:06,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:06,759 INFO L93 Difference]: Finished difference Result 31875 states and 117476 transitions. [2021-07-09 18:42:06,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:42:06,759 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:42:06,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:06,854 INFO L225 Difference]: With dead ends: 31875 [2021-07-09 18:42:06,854 INFO L226 Difference]: Without dead ends: 31875 [2021-07-09 18:42:06,855 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 431.8ms TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:42:06,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31875 states. [2021-07-09 18:42:07,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31875 to 25163. [2021-07-09 18:42:07,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25163 states, 25162 states have (on average 3.797631348859391) internal successors, (95556), 25162 states have internal predecessors, (95556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:07,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25163 states to 25163 states and 95556 transitions. [2021-07-09 18:42:07,557 INFO L78 Accepts]: Start accepts. Automaton has 25163 states and 95556 transitions. Word has length 28 [2021-07-09 18:42:07,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:07,557 INFO L482 AbstractCegarLoop]: Abstraction has 25163 states and 95556 transitions. [2021-07-09 18:42:07,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:07,557 INFO L276 IsEmpty]: Start isEmpty. Operand 25163 states and 95556 transitions. [2021-07-09 18:42:07,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:07,602 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:07,602 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:07,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4143 [2021-07-09 18:42:07,802 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:07,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:07,803 INFO L82 PathProgramCache]: Analyzing trace with hash -36901476, now seen corresponding path program 133 times [2021-07-09 18:42:07,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:07,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778157343] [2021-07-09 18:42:07,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:07,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:07,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:07,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:07,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778157343] [2021-07-09 18:42:07,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778157343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:07,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913503737] [2021-07-09 18:42:07,842 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:07,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:07,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:42:07,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:07,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:07,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913503737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:07,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:07,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-09 18:42:07,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432194539] [2021-07-09 18:42:07,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:42:07,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:07,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:42:07,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:42:07,909 INFO L87 Difference]: Start difference. First operand 25163 states and 95556 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:08,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:08,279 INFO L93 Difference]: Finished difference Result 30826 states and 116166 transitions. [2021-07-09 18:42:08,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:42:08,279 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:42:08,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:08,372 INFO L225 Difference]: With dead ends: 30826 [2021-07-09 18:42:08,372 INFO L226 Difference]: Without dead ends: 30813 [2021-07-09 18:42:08,373 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 120.3ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:42:08,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30813 states. [2021-07-09 18:42:08,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30813 to 29259. [2021-07-09 18:42:08,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29259 states, 29258 states have (on average 3.81594777496753) internal successors, (111647), 29258 states have internal predecessors, (111647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:09,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29259 states to 29259 states and 111647 transitions. [2021-07-09 18:42:09,315 INFO L78 Accepts]: Start accepts. Automaton has 29259 states and 111647 transitions. Word has length 28 [2021-07-09 18:42:09,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:09,315 INFO L482 AbstractCegarLoop]: Abstraction has 29259 states and 111647 transitions. [2021-07-09 18:42:09,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:09,315 INFO L276 IsEmpty]: Start isEmpty. Operand 29259 states and 111647 transitions. [2021-07-09 18:42:09,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:09,372 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:09,372 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:09,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4144,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:09,573 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:09,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:09,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1434176642, now seen corresponding path program 134 times [2021-07-09 18:42:09,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:09,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950269302] [2021-07-09 18:42:09,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:09,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:09,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:09,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:09,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950269302] [2021-07-09 18:42:09,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950269302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:09,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649060318] [2021-07-09 18:42:09,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:09,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:42:09,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:09,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:42:09,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:09,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:09,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649060318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:09,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:09,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-09 18:42:09,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630221247] [2021-07-09 18:42:09,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:42:09,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:09,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:42:09,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:42:09,853 INFO L87 Difference]: Start difference. First operand 29259 states and 111647 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:10,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:10,243 INFO L93 Difference]: Finished difference Result 32262 states and 120978 transitions. [2021-07-09 18:42:10,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:42:10,243 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:42:10,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:10,344 INFO L225 Difference]: With dead ends: 32262 [2021-07-09 18:42:10,344 INFO L226 Difference]: Without dead ends: 32262 [2021-07-09 18:42:10,344 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 302.7ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:42:10,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32262 states. [2021-07-09 18:42:10,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32262 to 29004. [2021-07-09 18:42:11,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29004 states, 29003 states have (on average 3.8122952797986414) internal successors, (110568), 29003 states have internal predecessors, (110568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:11,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29004 states to 29004 states and 110568 transitions. [2021-07-09 18:42:11,105 INFO L78 Accepts]: Start accepts. Automaton has 29004 states and 110568 transitions. Word has length 28 [2021-07-09 18:42:11,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:11,105 INFO L482 AbstractCegarLoop]: Abstraction has 29004 states and 110568 transitions. [2021-07-09 18:42:11,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:11,105 INFO L276 IsEmpty]: Start isEmpty. Operand 29004 states and 110568 transitions. [2021-07-09 18:42:11,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:11,161 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:11,162 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:11,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4145 [2021-07-09 18:42:11,362 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:11,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:11,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1001300038, now seen corresponding path program 135 times [2021-07-09 18:42:11,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:11,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713637158] [2021-07-09 18:42:11,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:11,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:11,507 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:11,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:11,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713637158] [2021-07-09 18:42:11,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713637158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:11,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403905880] [2021-07-09 18:42:11,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:11,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:42:11,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:11,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:11,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:11,620 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:11,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403905880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:11,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:11,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:42:11,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236548132] [2021-07-09 18:42:11,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:42:11,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:11,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:42:11,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:42:11,621 INFO L87 Difference]: Start difference. First operand 29004 states and 110568 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:12,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:12,341 INFO L93 Difference]: Finished difference Result 35430 states and 131896 transitions. [2021-07-09 18:42:12,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:42:12,342 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:42:12,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:12,462 INFO L225 Difference]: With dead ends: 35430 [2021-07-09 18:42:12,463 INFO L226 Difference]: Without dead ends: 35422 [2021-07-09 18:42:12,463 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 254.6ms TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:42:12,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35422 states. [2021-07-09 18:42:13,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35422 to 28970. [2021-07-09 18:42:13,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28970 states, 28969 states have (on average 3.8127308502191997) internal successors, (110451), 28969 states have internal predecessors, (110451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:13,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28970 states to 28970 states and 110451 transitions. [2021-07-09 18:42:13,415 INFO L78 Accepts]: Start accepts. Automaton has 28970 states and 110451 transitions. Word has length 28 [2021-07-09 18:42:13,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:13,415 INFO L482 AbstractCegarLoop]: Abstraction has 28970 states and 110451 transitions. [2021-07-09 18:42:13,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:13,415 INFO L276 IsEmpty]: Start isEmpty. Operand 28970 states and 110451 transitions. [2021-07-09 18:42:13,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:13,479 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:13,479 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:13,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4146,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:13,693 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:13,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:13,693 INFO L82 PathProgramCache]: Analyzing trace with hash 105479222, now seen corresponding path program 136 times [2021-07-09 18:42:13,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:13,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157485358] [2021-07-09 18:42:13,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:13,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:13,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:42:13,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:13,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157485358] [2021-07-09 18:42:13,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157485358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:13,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086736730] [2021-07-09 18:42:13,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:13,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:42:13,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:13,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:42:13,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:13,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:42:13,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086736730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:13,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:13,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-09 18:42:13,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144115133] [2021-07-09 18:42:13,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:42:13,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:13,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:42:13,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:42:13,794 INFO L87 Difference]: Start difference. First operand 28970 states and 110451 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:14,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:14,288 INFO L93 Difference]: Finished difference Result 31816 states and 119913 transitions. [2021-07-09 18:42:14,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:42:14,288 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:42:14,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:14,386 INFO L225 Difference]: With dead ends: 31816 [2021-07-09 18:42:14,386 INFO L226 Difference]: Without dead ends: 31816 [2021-07-09 18:42:14,386 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 253.7ms TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:42:14,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31816 states. [2021-07-09 18:42:15,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31816 to 29502. [2021-07-09 18:42:15,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29502 states, 29501 states have (on average 3.8112267380766753) internal successors, (112435), 29501 states have internal predecessors, (112435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:15,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29502 states to 29502 states and 112435 transitions. [2021-07-09 18:42:15,363 INFO L78 Accepts]: Start accepts. Automaton has 29502 states and 112435 transitions. Word has length 28 [2021-07-09 18:42:15,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:15,363 INFO L482 AbstractCegarLoop]: Abstraction has 29502 states and 112435 transitions. [2021-07-09 18:42:15,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:15,363 INFO L276 IsEmpty]: Start isEmpty. Operand 29502 states and 112435 transitions. [2021-07-09 18:42:15,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:15,441 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:15,441 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:15,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4147,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:15,641 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:15,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:15,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1598636696, now seen corresponding path program 137 times [2021-07-09 18:42:15,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:15,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598555061] [2021-07-09 18:42:15,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:15,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:15,676 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:42:15,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:15,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598555061] [2021-07-09 18:42:15,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598555061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:15,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926153984] [2021-07-09 18:42:15,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:15,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:42:15,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:15,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:15,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:15,751 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:42:15,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926153984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:15,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:15,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:42:15,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253634563] [2021-07-09 18:42:15,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:42:15,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:15,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:42:15,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:42:15,752 INFO L87 Difference]: Start difference. First operand 29502 states and 112435 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:16,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:16,430 INFO L93 Difference]: Finished difference Result 36375 states and 135365 transitions. [2021-07-09 18:42:16,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:42:16,430 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:42:16,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:16,540 INFO L225 Difference]: With dead ends: 36375 [2021-07-09 18:42:16,540 INFO L226 Difference]: Without dead ends: 36351 [2021-07-09 18:42:16,541 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 251.1ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:42:16,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36351 states. [2021-07-09 18:42:17,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36351 to 29684. [2021-07-09 18:42:17,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29684 states, 29683 states have (on average 3.806960212916484) internal successors, (113002), 29683 states have internal predecessors, (113002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:17,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29684 states to 29684 states and 113002 transitions. [2021-07-09 18:42:17,457 INFO L78 Accepts]: Start accepts. Automaton has 29684 states and 113002 transitions. Word has length 28 [2021-07-09 18:42:17,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:17,457 INFO L482 AbstractCegarLoop]: Abstraction has 29684 states and 113002 transitions. [2021-07-09 18:42:17,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:17,457 INFO L276 IsEmpty]: Start isEmpty. Operand 29684 states and 113002 transitions. [2021-07-09 18:42:17,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:17,518 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:17,518 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:17,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4148,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:17,718 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:17,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:17,718 INFO L82 PathProgramCache]: Analyzing trace with hash -252372998, now seen corresponding path program 138 times [2021-07-09 18:42:17,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:17,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279111805] [2021-07-09 18:42:17,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:17,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:17,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:17,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:17,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279111805] [2021-07-09 18:42:17,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279111805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:17,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195454558] [2021-07-09 18:42:17,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:17,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:42:17,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:17,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:42:17,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:17,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195454558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:17,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:17,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-07-09 18:42:17,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140042412] [2021-07-09 18:42:17,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:42:17,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:17,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:42:17,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:42:17,838 INFO L87 Difference]: Start difference. First operand 29684 states and 113002 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:18,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:18,413 INFO L93 Difference]: Finished difference Result 32240 states and 121414 transitions. [2021-07-09 18:42:18,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:42:18,413 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:42:18,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:18,626 INFO L225 Difference]: With dead ends: 32240 [2021-07-09 18:42:18,627 INFO L226 Difference]: Without dead ends: 32240 [2021-07-09 18:42:18,627 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 216.9ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:42:18,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32240 states. [2021-07-09 18:42:19,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32240 to 29610. [2021-07-09 18:42:19,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29610 states, 29609 states have (on average 3.8078287007328853) internal successors, (112746), 29609 states have internal predecessors, (112746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:19,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29610 states to 29610 states and 112746 transitions. [2021-07-09 18:42:19,342 INFO L78 Accepts]: Start accepts. Automaton has 29610 states and 112746 transitions. Word has length 28 [2021-07-09 18:42:19,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:19,342 INFO L482 AbstractCegarLoop]: Abstraction has 29610 states and 112746 transitions. [2021-07-09 18:42:19,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:19,342 INFO L276 IsEmpty]: Start isEmpty. Operand 29610 states and 112746 transitions. [2021-07-09 18:42:19,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:19,400 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:19,400 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:19,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4149,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:19,600 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:19,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:19,601 INFO L82 PathProgramCache]: Analyzing trace with hash 606143132, now seen corresponding path program 139 times [2021-07-09 18:42:19,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:19,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934860] [2021-07-09 18:42:19,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:19,639 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:19,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:19,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934860] [2021-07-09 18:42:19,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:19,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554209058] [2021-07-09 18:42:19,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:19,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:19,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:19,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:19,862 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:19,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554209058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:19,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:19,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-09 18:42:19,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90796950] [2021-07-09 18:42:19,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:42:19,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:19,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:42:19,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:42:19,863 INFO L87 Difference]: Start difference. First operand 29610 states and 112746 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:20,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:20,620 INFO L93 Difference]: Finished difference Result 36298 states and 135106 transitions. [2021-07-09 18:42:20,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:42:20,620 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:42:20,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:20,728 INFO L225 Difference]: With dead ends: 36298 [2021-07-09 18:42:20,728 INFO L226 Difference]: Without dead ends: 36258 [2021-07-09 18:42:20,729 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 319.1ms TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:42:20,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36258 states. [2021-07-09 18:42:21,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36258 to 29776. [2021-07-09 18:42:21,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29776 states, 29775 states have (on average 3.803761544920235) internal successors, (113257), 29775 states have internal predecessors, (113257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:21,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29776 states to 29776 states and 113257 transitions. [2021-07-09 18:42:21,665 INFO L78 Accepts]: Start accepts. Automaton has 29776 states and 113257 transitions. Word has length 28 [2021-07-09 18:42:21,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:21,666 INFO L482 AbstractCegarLoop]: Abstraction has 29776 states and 113257 transitions. [2021-07-09 18:42:21,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:21,666 INFO L276 IsEmpty]: Start isEmpty. Operand 29776 states and 113257 transitions. [2021-07-09 18:42:21,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:21,730 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:21,730 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:21,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4150 [2021-07-09 18:42:21,931 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:21,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:21,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1649950116, now seen corresponding path program 140 times [2021-07-09 18:42:21,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:21,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264952007] [2021-07-09 18:42:21,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:21,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:21,963 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:21,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:21,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264952007] [2021-07-09 18:42:21,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264952007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:21,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674498488] [2021-07-09 18:42:21,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:21,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:42:21,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:21,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:21,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:22,089 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:22,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674498488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:22,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:22,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:42:22,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580652659] [2021-07-09 18:42:22,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:42:22,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:22,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:42:22,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:42:22,090 INFO L87 Difference]: Start difference. First operand 29776 states and 113257 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:23,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:23,521 INFO L93 Difference]: Finished difference Result 68142 states and 250877 transitions. [2021-07-09 18:42:23,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-09 18:42:23,521 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:42:23,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:23,899 INFO L225 Difference]: With dead ends: 68142 [2021-07-09 18:42:23,899 INFO L226 Difference]: Without dead ends: 68142 [2021-07-09 18:42:23,900 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 722.0ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:42:23,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68142 states. [2021-07-09 18:42:25,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68142 to 37503. [2021-07-09 18:42:25,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37503 states, 37502 states have (on average 3.8855527705189057) internal successors, (145716), 37502 states have internal predecessors, (145716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:25,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37503 states to 37503 states and 145716 transitions. [2021-07-09 18:42:25,528 INFO L78 Accepts]: Start accepts. Automaton has 37503 states and 145716 transitions. Word has length 28 [2021-07-09 18:42:25,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:25,528 INFO L482 AbstractCegarLoop]: Abstraction has 37503 states and 145716 transitions. [2021-07-09 18:42:25,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:25,528 INFO L276 IsEmpty]: Start isEmpty. Operand 37503 states and 145716 transitions. [2021-07-09 18:42:25,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:25,592 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:25,592 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:25,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4151,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:25,793 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:25,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:25,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1082998036, now seen corresponding path program 141 times [2021-07-09 18:42:25,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:25,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951651671] [2021-07-09 18:42:25,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:25,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:25,822 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:25,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:25,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951651671] [2021-07-09 18:42:25,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951651671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:25,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687185134] [2021-07-09 18:42:25,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:25,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:42:25,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:25,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:25,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:25,938 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:25,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687185134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:25,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:25,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:42:25,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196324487] [2021-07-09 18:42:25,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:42:25,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:25,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:42:25,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:42:25,939 INFO L87 Difference]: Start difference. First operand 37503 states and 145716 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:27,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:27,406 INFO L93 Difference]: Finished difference Result 67515 states and 249216 transitions. [2021-07-09 18:42:27,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-09 18:42:27,406 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:42:27,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:27,630 INFO L225 Difference]: With dead ends: 67515 [2021-07-09 18:42:27,630 INFO L226 Difference]: Without dead ends: 67515 [2021-07-09 18:42:27,631 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 760.3ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:42:27,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67515 states. [2021-07-09 18:42:29,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67515 to 37500. [2021-07-09 18:42:29,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37500 states, 37499 states have (on average 3.885490279740793) internal successors, (145702), 37499 states have internal predecessors, (145702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:29,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37500 states to 37500 states and 145702 transitions. [2021-07-09 18:42:29,310 INFO L78 Accepts]: Start accepts. Automaton has 37500 states and 145702 transitions. Word has length 28 [2021-07-09 18:42:29,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:29,310 INFO L482 AbstractCegarLoop]: Abstraction has 37500 states and 145702 transitions. [2021-07-09 18:42:29,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:29,310 INFO L276 IsEmpty]: Start isEmpty. Operand 37500 states and 145702 transitions. [2021-07-09 18:42:29,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:29,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:29,378 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:29,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4152 [2021-07-09 18:42:29,578 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:29,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:29,579 INFO L82 PathProgramCache]: Analyzing trace with hash 2039623402, now seen corresponding path program 142 times [2021-07-09 18:42:29,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:29,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054204797] [2021-07-09 18:42:29,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:29,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:29,608 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:29,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:29,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054204797] [2021-07-09 18:42:29,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054204797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:29,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946160714] [2021-07-09 18:42:29,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:29,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:42:29,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:29,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:29,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:29,717 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:29,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946160714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:29,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:29,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 18:42:29,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164542060] [2021-07-09 18:42:29,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:42:29,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:29,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:42:29,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:42:29,718 INFO L87 Difference]: Start difference. First operand 37500 states and 145702 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:30,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:30,975 INFO L93 Difference]: Finished difference Result 62937 states and 233716 transitions. [2021-07-09 18:42:30,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 18:42:30,976 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:42:30,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:31,332 INFO L225 Difference]: With dead ends: 62937 [2021-07-09 18:42:31,332 INFO L226 Difference]: Without dead ends: 62937 [2021-07-09 18:42:31,333 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 668.8ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:42:31,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62937 states. [2021-07-09 18:42:32,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62937 to 37524. [2021-07-09 18:42:32,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37524 states, 37523 states have (on average 3.885830024251792) internal successors, (145808), 37523 states have internal predecessors, (145808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:32,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37524 states to 37524 states and 145808 transitions. [2021-07-09 18:42:32,753 INFO L78 Accepts]: Start accepts. Automaton has 37524 states and 145808 transitions. Word has length 28 [2021-07-09 18:42:32,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:32,753 INFO L482 AbstractCegarLoop]: Abstraction has 37524 states and 145808 transitions. [2021-07-09 18:42:32,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:32,753 INFO L276 IsEmpty]: Start isEmpty. Operand 37524 states and 145808 transitions. [2021-07-09 18:42:32,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:32,820 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:32,820 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:33,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4153 [2021-07-09 18:42:33,020 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:33,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:33,020 INFO L82 PathProgramCache]: Analyzing trace with hash 2120999490, now seen corresponding path program 143 times [2021-07-09 18:42:33,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:33,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661820556] [2021-07-09 18:42:33,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:33,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:33,230 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:33,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:33,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661820556] [2021-07-09 18:42:33,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661820556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:33,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397085355] [2021-07-09 18:42:33,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:33,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:42:33,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:33,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:33,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:33,353 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:33,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397085355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:33,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:33,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 18:42:33,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833972191] [2021-07-09 18:42:33,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:42:33,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:33,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:42:33,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:42:33,354 INFO L87 Difference]: Start difference. First operand 37524 states and 145808 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:34,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:34,512 INFO L93 Difference]: Finished difference Result 62070 states and 231476 transitions. [2021-07-09 18:42:34,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 18:42:34,512 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:42:34,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:34,712 INFO L225 Difference]: With dead ends: 62070 [2021-07-09 18:42:34,712 INFO L226 Difference]: Without dead ends: 62062 [2021-07-09 18:42:34,712 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 482.2ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:42:34,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62062 states. [2021-07-09 18:42:36,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62062 to 37524. [2021-07-09 18:42:36,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37524 states, 37523 states have (on average 3.885670122324974) internal successors, (145802), 37523 states have internal predecessors, (145802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:36,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37524 states to 37524 states and 145802 transitions. [2021-07-09 18:42:36,224 INFO L78 Accepts]: Start accepts. Automaton has 37524 states and 145802 transitions. Word has length 28 [2021-07-09 18:42:36,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:36,224 INFO L482 AbstractCegarLoop]: Abstraction has 37524 states and 145802 transitions. [2021-07-09 18:42:36,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:36,224 INFO L276 IsEmpty]: Start isEmpty. Operand 37524 states and 145802 transitions. [2021-07-09 18:42:36,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:36,288 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:36,288 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:36,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4154,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:36,489 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:36,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:36,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1243310590, now seen corresponding path program 144 times [2021-07-09 18:42:36,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:36,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047480249] [2021-07-09 18:42:36,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:36,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:36,519 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:36,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:36,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047480249] [2021-07-09 18:42:36,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047480249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:36,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218013304] [2021-07-09 18:42:36,519 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:36,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:42:36,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:36,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:36,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:36,634 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:36,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218013304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:36,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:36,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:42:36,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639379275] [2021-07-09 18:42:36,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:42:36,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:36,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:42:36,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:42:36,635 INFO L87 Difference]: Start difference. First operand 37524 states and 145802 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:37,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:37,856 INFO L93 Difference]: Finished difference Result 61748 states and 230607 transitions. [2021-07-09 18:42:37,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 18:42:37,857 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:42:37,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:38,055 INFO L225 Difference]: With dead ends: 61748 [2021-07-09 18:42:38,055 INFO L226 Difference]: Without dead ends: 61748 [2021-07-09 18:42:38,055 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 534.4ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:42:38,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61748 states. [2021-07-09 18:42:39,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61748 to 37532. [2021-07-09 18:42:39,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37532 states, 37531 states have (on average 3.8857477818336843) internal successors, (145836), 37531 states have internal predecessors, (145836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:39,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37532 states to 37532 states and 145836 transitions. [2021-07-09 18:42:39,602 INFO L78 Accepts]: Start accepts. Automaton has 37532 states and 145836 transitions. Word has length 28 [2021-07-09 18:42:39,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:39,602 INFO L482 AbstractCegarLoop]: Abstraction has 37532 states and 145836 transitions. [2021-07-09 18:42:39,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:39,602 INFO L276 IsEmpty]: Start isEmpty. Operand 37532 states and 145836 transitions. [2021-07-09 18:42:39,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:39,668 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:39,668 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:39,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4155 [2021-07-09 18:42:39,868 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:39,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:39,868 INFO L82 PathProgramCache]: Analyzing trace with hash 399728564, now seen corresponding path program 145 times [2021-07-09 18:42:39,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:39,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441306829] [2021-07-09 18:42:39,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:39,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:39,898 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:39,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:39,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441306829] [2021-07-09 18:42:39,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441306829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:39,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84747458] [2021-07-09 18:42:39,898 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:39,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:39,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:39,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:40,016 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:40,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84747458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:40,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:40,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:42:40,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508213592] [2021-07-09 18:42:40,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:42:40,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:40,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:42:40,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:42:40,017 INFO L87 Difference]: Start difference. First operand 37532 states and 145836 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:40,802 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2021-07-09 18:42:41,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:41,153 INFO L93 Difference]: Finished difference Result 61537 states and 230081 transitions. [2021-07-09 18:42:41,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 18:42:41,153 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:42:41,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:41,354 INFO L225 Difference]: With dead ends: 61537 [2021-07-09 18:42:41,355 INFO L226 Difference]: Without dead ends: 61529 [2021-07-09 18:42:41,355 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 586.0ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:42:41,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61529 states. [2021-07-09 18:42:42,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61529 to 37532. [2021-07-09 18:42:42,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37532 states, 37531 states have (on average 3.885694492552823) internal successors, (145834), 37531 states have internal predecessors, (145834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:42,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37532 states to 37532 states and 145834 transitions. [2021-07-09 18:42:42,790 INFO L78 Accepts]: Start accepts. Automaton has 37532 states and 145834 transitions. Word has length 28 [2021-07-09 18:42:42,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:42,790 INFO L482 AbstractCegarLoop]: Abstraction has 37532 states and 145834 transitions. [2021-07-09 18:42:42,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:42,790 INFO L276 IsEmpty]: Start isEmpty. Operand 37532 states and 145834 transitions. [2021-07-09 18:42:42,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:42,857 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:42,857 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:43,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4156 [2021-07-09 18:42:43,058 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:43,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:43,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1403156548, now seen corresponding path program 146 times [2021-07-09 18:42:43,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:43,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731278687] [2021-07-09 18:42:43,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:43,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:43,088 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:43,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:43,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731278687] [2021-07-09 18:42:43,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731278687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:43,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153624331] [2021-07-09 18:42:43,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:43,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:42:43,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:43,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:43,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:43,327 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:43,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153624331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:43,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:43,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-09 18:42:43,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210396127] [2021-07-09 18:42:43,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:42:43,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:43,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:42:43,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:42:43,328 INFO L87 Difference]: Start difference. First operand 37532 states and 145834 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:44,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:44,560 INFO L93 Difference]: Finished difference Result 60940 states and 226561 transitions. [2021-07-09 18:42:44,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-09 18:42:44,560 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:42:44,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:44,757 INFO L225 Difference]: With dead ends: 60940 [2021-07-09 18:42:44,757 INFO L226 Difference]: Without dead ends: 60940 [2021-07-09 18:42:44,757 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 557.6ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:42:44,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60940 states. [2021-07-09 18:42:46,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60940 to 40347. [2021-07-09 18:42:46,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40347 states, 40346 states have (on average 3.8897040598820207) internal successors, (156934), 40346 states have internal predecessors, (156934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:46,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40347 states to 40347 states and 156934 transitions. [2021-07-09 18:42:46,350 INFO L78 Accepts]: Start accepts. Automaton has 40347 states and 156934 transitions. Word has length 28 [2021-07-09 18:42:46,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:46,350 INFO L482 AbstractCegarLoop]: Abstraction has 40347 states and 156934 transitions. [2021-07-09 18:42:46,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:46,350 INFO L276 IsEmpty]: Start isEmpty. Operand 40347 states and 156934 transitions. [2021-07-09 18:42:46,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:46,424 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:46,424 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:46,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4157,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:46,624 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:46,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:46,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1484532636, now seen corresponding path program 147 times [2021-07-09 18:42:46,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:46,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064332042] [2021-07-09 18:42:46,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:46,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:46,655 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:46,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:46,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064332042] [2021-07-09 18:42:46,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064332042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:46,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752343057] [2021-07-09 18:42:46,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:46,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:42:46,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:46,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:46,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:46,748 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:46,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752343057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:46,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:46,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-09 18:42:46,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950173848] [2021-07-09 18:42:46,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:42:46,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:46,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:42:46,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:42:46,749 INFO L87 Difference]: Start difference. First operand 40347 states and 156934 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:47,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:47,867 INFO L93 Difference]: Finished difference Result 60463 states and 225303 transitions. [2021-07-09 18:42:47,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 18:42:47,867 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:42:47,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:48,067 INFO L225 Difference]: With dead ends: 60463 [2021-07-09 18:42:48,067 INFO L226 Difference]: Without dead ends: 60455 [2021-07-09 18:42:48,067 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 453.0ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:42:48,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60455 states. [2021-07-09 18:42:49,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60455 to 40063. [2021-07-09 18:42:49,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40063 states, 40062 states have (on average 3.8951125755079627) internal successors, (156046), 40062 states have internal predecessors, (156046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:49,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40063 states to 40063 states and 156046 transitions. [2021-07-09 18:42:49,618 INFO L78 Accepts]: Start accepts. Automaton has 40063 states and 156046 transitions. Word has length 28 [2021-07-09 18:42:49,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:49,618 INFO L482 AbstractCegarLoop]: Abstraction has 40063 states and 156046 transitions. [2021-07-09 18:42:49,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:49,619 INFO L276 IsEmpty]: Start isEmpty. Operand 40063 states and 156046 transitions. [2021-07-09 18:42:49,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:49,684 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:49,684 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:49,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4158,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:49,884 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:49,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:49,884 INFO L82 PathProgramCache]: Analyzing trace with hash -30559336, now seen corresponding path program 148 times [2021-07-09 18:42:49,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:49,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141692687] [2021-07-09 18:42:49,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:49,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:49,915 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:49,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:49,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141692687] [2021-07-09 18:42:49,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141692687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:49,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627531224] [2021-07-09 18:42:49,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:49,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:42:49,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:49,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:49,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:50,009 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:50,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627531224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:50,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:50,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-09 18:42:50,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725240733] [2021-07-09 18:42:50,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:42:50,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:50,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:42:50,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:42:50,010 INFO L87 Difference]: Start difference. First operand 40063 states and 156046 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:51,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:51,161 INFO L93 Difference]: Finished difference Result 59012 states and 221313 transitions. [2021-07-09 18:42:51,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:42:51,162 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:42:51,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:51,358 INFO L225 Difference]: With dead ends: 59012 [2021-07-09 18:42:51,358 INFO L226 Difference]: Without dead ends: 58988 [2021-07-09 18:42:51,359 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 351.6ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:42:51,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58988 states. [2021-07-09 18:42:53,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58988 to 39973. [2021-07-09 18:42:53,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39973 states, 39972 states have (on average 3.8949514660262183) internal successors, (155689), 39972 states have internal predecessors, (155689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:53,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39973 states to 39973 states and 155689 transitions. [2021-07-09 18:42:53,314 INFO L78 Accepts]: Start accepts. Automaton has 39973 states and 155689 transitions. Word has length 28 [2021-07-09 18:42:53,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:53,314 INFO L482 AbstractCegarLoop]: Abstraction has 39973 states and 155689 transitions. [2021-07-09 18:42:53,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:53,314 INFO L276 IsEmpty]: Start isEmpty. Operand 39973 states and 155689 transitions. [2021-07-09 18:42:53,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:53,384 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:53,384 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:53,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4159,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:53,600 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:53,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:53,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1566567380, now seen corresponding path program 149 times [2021-07-09 18:42:53,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:53,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049494536] [2021-07-09 18:42:53,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:53,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:53,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:42:53,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:53,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049494536] [2021-07-09 18:42:53,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049494536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:53,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628487210] [2021-07-09 18:42:53,633 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:53,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:42:53,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:53,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:53,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:53,754 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:53,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628487210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:53,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:53,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:42:53,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555413498] [2021-07-09 18:42:53,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:42:53,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:53,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:42:53,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:42:53,754 INFO L87 Difference]: Start difference. First operand 39973 states and 155689 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:54,599 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-07-09 18:42:55,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:55,247 INFO L93 Difference]: Finished difference Result 60251 states and 224712 transitions. [2021-07-09 18:42:55,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-09 18:42:55,248 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:42:55,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:55,804 INFO L225 Difference]: With dead ends: 60251 [2021-07-09 18:42:55,805 INFO L226 Difference]: Without dead ends: 60251 [2021-07-09 18:42:55,805 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 894.2ms TimeCoverageRelationStatistics Valid=878, Invalid=3412, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:42:55,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60251 states. [2021-07-09 18:42:57,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60251 to 40069. [2021-07-09 18:42:58,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40069 states, 40068 states have (on average 3.8934561245882002) internal successors, (156003), 40068 states have internal predecessors, (156003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:58,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40069 states to 40069 states and 156003 transitions. [2021-07-09 18:42:58,205 INFO L78 Accepts]: Start accepts. Automaton has 40069 states and 156003 transitions. Word has length 28 [2021-07-09 18:42:58,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:58,205 INFO L482 AbstractCegarLoop]: Abstraction has 40069 states and 156003 transitions. [2021-07-09 18:42:58,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:58,205 INFO L276 IsEmpty]: Start isEmpty. Operand 40069 states and 156003 transitions. [2021-07-09 18:42:58,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:58,281 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:58,281 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:58,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4160,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:58,481 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:58,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:58,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1085360762, now seen corresponding path program 150 times [2021-07-09 18:42:58,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:58,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449055674] [2021-07-09 18:42:58,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:58,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:58,512 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:42:58,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:58,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449055674] [2021-07-09 18:42:58,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449055674] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:58,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001109887] [2021-07-09 18:42:58,512 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:58,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:42:58,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:58,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:58,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:58,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:58,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001109887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:58,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:58,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:42:58,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106516461] [2021-07-09 18:42:58,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:42:58,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:58,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:42:58,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:42:58,624 INFO L87 Difference]: Start difference. First operand 40069 states and 156003 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:59,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:59,733 INFO L93 Difference]: Finished difference Result 59938 states and 223824 transitions. [2021-07-09 18:42:59,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:42:59,733 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:42:59,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:59,923 INFO L225 Difference]: With dead ends: 59938 [2021-07-09 18:42:59,923 INFO L226 Difference]: Without dead ends: 59930 [2021-07-09 18:42:59,924 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 598.9ms TimeCoverageRelationStatistics Valid=716, Invalid=2590, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:42:59,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59930 states. [2021-07-09 18:43:01,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59930 to 40001. [2021-07-09 18:43:01,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40001 states, 40000 states have (on average 3.894775) internal successors, (155791), 40000 states have internal predecessors, (155791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:01,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40001 states to 40001 states and 155791 transitions. [2021-07-09 18:43:01,407 INFO L78 Accepts]: Start accepts. Automaton has 40001 states and 155791 transitions. Word has length 28 [2021-07-09 18:43:01,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:01,407 INFO L482 AbstractCegarLoop]: Abstraction has 40001 states and 155791 transitions. [2021-07-09 18:43:01,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:01,407 INFO L276 IsEmpty]: Start isEmpty. Operand 40001 states and 155791 transitions. [2021-07-09 18:43:01,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:43:01,475 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:01,476 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:01,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4161,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:01,676 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:01,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:01,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1942149356, now seen corresponding path program 151 times [2021-07-09 18:43:01,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:01,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601841683] [2021-07-09 18:43:01,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:01,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:01,707 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:43:01,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:01,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601841683] [2021-07-09 18:43:01,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601841683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:01,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903637858] [2021-07-09 18:43:01,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:01,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:01,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:43:01,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:01,807 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:01,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903637858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:01,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:01,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 18:43:01,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604085930] [2021-07-09 18:43:01,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:43:01,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:01,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:43:01,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:43:01,808 INFO L87 Difference]: Start difference. First operand 40001 states and 155791 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:02,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:02,722 INFO L93 Difference]: Finished difference Result 58669 states and 220313 transitions. [2021-07-09 18:43:02,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:43:02,722 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:43:02,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:02,913 INFO L225 Difference]: With dead ends: 58669 [2021-07-09 18:43:02,913 INFO L226 Difference]: Without dead ends: 58645 [2021-07-09 18:43:02,913 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 331.5ms TimeCoverageRelationStatistics Valid=487, Invalid=1675, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:43:02,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58645 states. [2021-07-09 18:43:04,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58645 to 39977. [2021-07-09 18:43:04,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39977 states, 39976 states have (on average 3.894911947168301) internal successors, (155703), 39976 states have internal predecessors, (155703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:04,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39977 states to 39977 states and 155703 transitions. [2021-07-09 18:43:04,395 INFO L78 Accepts]: Start accepts. Automaton has 39977 states and 155703 transitions. Word has length 28 [2021-07-09 18:43:04,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:04,395 INFO L482 AbstractCegarLoop]: Abstraction has 39977 states and 155703 transitions. [2021-07-09 18:43:04,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:04,396 INFO L276 IsEmpty]: Start isEmpty. Operand 39977 states and 155703 transitions. [2021-07-09 18:43:04,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:43:04,466 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:04,466 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:04,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4162 [2021-07-09 18:43:04,666 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:04,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:04,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1119483464, now seen corresponding path program 152 times [2021-07-09 18:43:04,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:04,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582925760] [2021-07-09 18:43:04,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:04,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:04,702 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:04,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:04,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582925760] [2021-07-09 18:43:04,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582925760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:04,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673363997] [2021-07-09 18:43:04,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:04,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:43:04,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:04,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:43:04,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:04,794 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:04,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673363997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:04,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:04,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:43:04,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466300851] [2021-07-09 18:43:04,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:43:04,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:04,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:43:04,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:43:04,795 INFO L87 Difference]: Start difference. First operand 39977 states and 155703 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:06,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:06,356 INFO L93 Difference]: Finished difference Result 61863 states and 229407 transitions. [2021-07-09 18:43:06,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-07-09 18:43:06,357 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:43:06,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:06,711 INFO L225 Difference]: With dead ends: 61863 [2021-07-09 18:43:06,711 INFO L226 Difference]: Without dead ends: 61863 [2021-07-09 18:43:06,711 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 921.6ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-07-09 18:43:06,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61863 states. [2021-07-09 18:43:07,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61863 to 44335. [2021-07-09 18:43:07,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44335 states, 44334 states have (on average 3.8447692515902014) internal successors, (170454), 44334 states have internal predecessors, (170454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:08,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44335 states to 44335 states and 170454 transitions. [2021-07-09 18:43:08,121 INFO L78 Accepts]: Start accepts. Automaton has 44335 states and 170454 transitions. Word has length 28 [2021-07-09 18:43:08,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:08,121 INFO L482 AbstractCegarLoop]: Abstraction has 44335 states and 170454 transitions. [2021-07-09 18:43:08,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:08,121 INFO L276 IsEmpty]: Start isEmpty. Operand 44335 states and 170454 transitions. [2021-07-09 18:43:08,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:43:08,199 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:08,199 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:08,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4163 [2021-07-09 18:43:08,405 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:08,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:08,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1200859552, now seen corresponding path program 153 times [2021-07-09 18:43:08,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:08,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330881720] [2021-07-09 18:43:08,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:08,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:08,440 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:08,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:08,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330881720] [2021-07-09 18:43:08,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330881720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:08,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022614490] [2021-07-09 18:43:08,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:08,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:43:08,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:08,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:43:08,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:08,525 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:08,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022614490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:08,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:08,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:43:08,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644547785] [2021-07-09 18:43:08,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:43:08,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:08,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:43:08,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:43:08,526 INFO L87 Difference]: Start difference. First operand 44335 states and 170454 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:10,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:10,141 INFO L93 Difference]: Finished difference Result 61094 states and 227301 transitions. [2021-07-09 18:43:10,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-09 18:43:10,141 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:43:10,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:10,330 INFO L225 Difference]: With dead ends: 61094 [2021-07-09 18:43:10,330 INFO L226 Difference]: Without dead ends: 61086 [2021-07-09 18:43:10,331 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 622.9ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 18:43:10,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61086 states. [2021-07-09 18:43:11,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61086 to 43181. [2021-07-09 18:43:11,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43181 states, 43180 states have (on average 3.8640805928670683) internal successors, (166851), 43180 states have internal predecessors, (166851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:11,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43181 states to 43181 states and 166851 transitions. [2021-07-09 18:43:11,759 INFO L78 Accepts]: Start accepts. Automaton has 43181 states and 166851 transitions. Word has length 28 [2021-07-09 18:43:11,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:11,759 INFO L482 AbstractCegarLoop]: Abstraction has 43181 states and 166851 transitions. [2021-07-09 18:43:11,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:11,759 INFO L276 IsEmpty]: Start isEmpty. Operand 43181 states and 166851 transitions. [2021-07-09 18:43:12,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:43:12,018 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:12,018 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:12,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4164 [2021-07-09 18:43:12,226 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:12,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:12,226 INFO L82 PathProgramCache]: Analyzing trace with hash -314232420, now seen corresponding path program 154 times [2021-07-09 18:43:12,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:12,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168937598] [2021-07-09 18:43:12,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:12,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:12,263 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:12,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:12,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168937598] [2021-07-09 18:43:12,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168937598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:12,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894649054] [2021-07-09 18:43:12,264 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:12,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:43:12,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:12,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:43:12,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:12,349 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:12,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894649054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:12,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:12,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:43:12,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336435498] [2021-07-09 18:43:12,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:43:12,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:12,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:43:12,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:43:12,350 INFO L87 Difference]: Start difference. First operand 43181 states and 166851 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:13,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:13,554 INFO L93 Difference]: Finished difference Result 59433 states and 222664 transitions. [2021-07-09 18:43:13,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 18:43:13,555 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:43:13,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:13,744 INFO L225 Difference]: With dead ends: 59433 [2021-07-09 18:43:13,744 INFO L226 Difference]: Without dead ends: 59409 [2021-07-09 18:43:13,744 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 540.8ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:43:13,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59409 states. [2021-07-09 18:43:14,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59409 to 43201. [2021-07-09 18:43:15,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43201 states, 43200 states have (on average 3.861782407407407) internal successors, (166829), 43200 states have internal predecessors, (166829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:15,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43201 states to 43201 states and 166829 transitions. [2021-07-09 18:43:15,305 INFO L78 Accepts]: Start accepts. Automaton has 43201 states and 166829 transitions. Word has length 28 [2021-07-09 18:43:15,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:15,306 INFO L482 AbstractCegarLoop]: Abstraction has 43201 states and 166829 transitions. [2021-07-09 18:43:15,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:15,306 INFO L276 IsEmpty]: Start isEmpty. Operand 43201 states and 166829 transitions. [2021-07-09 18:43:15,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:43:15,385 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:15,385 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:15,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4165 [2021-07-09 18:43:15,585 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:15,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:15,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1316197732, now seen corresponding path program 155 times [2021-07-09 18:43:15,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:15,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956074104] [2021-07-09 18:43:15,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:15,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:15,627 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:15,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:15,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956074104] [2021-07-09 18:43:15,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956074104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:15,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424332077] [2021-07-09 18:43:15,628 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:15,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:43:15,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:15,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:43:15,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:15,713 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:15,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424332077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:15,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:15,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:43:15,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140552410] [2021-07-09 18:43:15,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:43:15,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:15,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:43:15,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:43:15,714 INFO L87 Difference]: Start difference. First operand 43201 states and 166829 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:16,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:16,858 INFO L93 Difference]: Finished difference Result 60686 states and 226187 transitions. [2021-07-09 18:43:16,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 18:43:16,858 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:43:16,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:17,055 INFO L225 Difference]: With dead ends: 60686 [2021-07-09 18:43:17,055 INFO L226 Difference]: Without dead ends: 60646 [2021-07-09 18:43:17,055 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 490.5ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:43:17,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60646 states. [2021-07-09 18:43:18,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60646 to 43335. [2021-07-09 18:43:18,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43335 states, 43334 states have (on average 3.8610790603221488) internal successors, (167316), 43334 states have internal predecessors, (167316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:18,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43335 states to 43335 states and 167316 transitions. [2021-07-09 18:43:18,625 INFO L78 Accepts]: Start accepts. Automaton has 43335 states and 167316 transitions. Word has length 28 [2021-07-09 18:43:18,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:18,625 INFO L482 AbstractCegarLoop]: Abstraction has 43335 states and 167316 transitions. [2021-07-09 18:43:18,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:18,625 INFO L276 IsEmpty]: Start isEmpty. Operand 43335 states and 167316 transitions. [2021-07-09 18:43:18,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:43:18,701 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:18,701 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:18,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4166 [2021-07-09 18:43:18,901 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:18,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:18,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1262992088, now seen corresponding path program 156 times [2021-07-09 18:43:18,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:18,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876405887] [2021-07-09 18:43:18,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:18,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:18,938 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:18,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:18,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876405887] [2021-07-09 18:43:18,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876405887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:18,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193945248] [2021-07-09 18:43:18,938 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:18,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:43:18,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:18,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:43:18,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:19,057 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:19,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193945248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:19,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:19,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:43:19,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308302064] [2021-07-09 18:43:19,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:43:19,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:19,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:43:19,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:43:19,058 INFO L87 Difference]: Start difference. First operand 43335 states and 167316 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:20,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:20,584 INFO L93 Difference]: Finished difference Result 59923 states and 223885 transitions. [2021-07-09 18:43:20,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-09 18:43:20,584 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:43:20,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:20,936 INFO L225 Difference]: With dead ends: 59923 [2021-07-09 18:43:20,936 INFO L226 Difference]: Without dead ends: 59923 [2021-07-09 18:43:20,936 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 779.5ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-07-09 18:43:20,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59923 states. [2021-07-09 18:43:22,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59923 to 44240. [2021-07-09 18:43:22,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44240 states, 44239 states have (on average 3.851511110106467) internal successors, (170387), 44239 states have internal predecessors, (170387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:22,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44240 states to 44240 states and 170387 transitions. [2021-07-09 18:43:22,258 INFO L78 Accepts]: Start accepts. Automaton has 44240 states and 170387 transitions. Word has length 28 [2021-07-09 18:43:22,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:22,258 INFO L482 AbstractCegarLoop]: Abstraction has 44240 states and 170387 transitions. [2021-07-09 18:43:22,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:22,258 INFO L276 IsEmpty]: Start isEmpty. Operand 44240 states and 170387 transitions. [2021-07-09 18:43:22,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:43:22,334 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:22,334 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:22,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4167 [2021-07-09 18:43:22,535 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:22,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:22,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1388936054, now seen corresponding path program 157 times [2021-07-09 18:43:22,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:22,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944127077] [2021-07-09 18:43:22,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:22,574 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:22,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:22,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944127077] [2021-07-09 18:43:22,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944127077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:22,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942036064] [2021-07-09 18:43:22,574 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:22,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:22,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:43:22,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:22,691 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:22,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942036064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:22,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:22,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:43:22,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051660265] [2021-07-09 18:43:22,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:43:22,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:22,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:43:22,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:43:22,692 INFO L87 Difference]: Start difference. First operand 44240 states and 170387 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:24,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:24,074 INFO L93 Difference]: Finished difference Result 59425 states and 222490 transitions. [2021-07-09 18:43:24,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 18:43:24,075 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:43:24,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:24,270 INFO L225 Difference]: With dead ends: 59425 [2021-07-09 18:43:24,270 INFO L226 Difference]: Without dead ends: 59417 [2021-07-09 18:43:24,270 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1724 ImplicationChecksByTransitivity, 779.8ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:43:24,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59417 states. [2021-07-09 18:43:25,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59417 to 44164. [2021-07-09 18:43:25,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44164 states, 44163 states have (on average 3.8527953264044563) internal successors, (170151), 44163 states have internal predecessors, (170151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:25,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44164 states to 44164 states and 170151 transitions. [2021-07-09 18:43:25,725 INFO L78 Accepts]: Start accepts. Automaton has 44164 states and 170151 transitions. Word has length 28 [2021-07-09 18:43:25,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:25,725 INFO L482 AbstractCegarLoop]: Abstraction has 44164 states and 170151 transitions. [2021-07-09 18:43:25,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:25,725 INFO L276 IsEmpty]: Start isEmpty. Operand 44164 states and 170151 transitions. [2021-07-09 18:43:25,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:43:25,982 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:25,982 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:26,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4168,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:26,204 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:26,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:26,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1638574064, now seen corresponding path program 158 times [2021-07-09 18:43:26,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:26,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368132939] [2021-07-09 18:43:26,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:26,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:26,241 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:26,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:26,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368132939] [2021-07-09 18:43:26,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368132939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:26,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964547380] [2021-07-09 18:43:26,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:26,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:43:26,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:26,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:43:26,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:26,344 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:26,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964547380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:26,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:26,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:43:26,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331472978] [2021-07-09 18:43:26,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:43:26,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:26,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:43:26,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:43:26,344 INFO L87 Difference]: Start difference. First operand 44164 states and 170151 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:27,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:27,545 INFO L93 Difference]: Finished difference Result 58902 states and 221244 transitions. [2021-07-09 18:43:27,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 18:43:27,545 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:43:27,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:27,730 INFO L225 Difference]: With dead ends: 58902 [2021-07-09 18:43:27,731 INFO L226 Difference]: Without dead ends: 58878 [2021-07-09 18:43:27,731 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 522.6ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:43:27,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58878 states. [2021-07-09 18:43:28,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58878 to 44150. [2021-07-09 18:43:29,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44150 states, 44149 states have (on average 3.8527712971981245) internal successors, (170096), 44149 states have internal predecessors, (170096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:29,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44150 states to 44150 states and 170096 transitions. [2021-07-09 18:43:29,316 INFO L78 Accepts]: Start accepts. Automaton has 44150 states and 170096 transitions. Word has length 28 [2021-07-09 18:43:29,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:29,316 INFO L482 AbstractCegarLoop]: Abstraction has 44150 states and 170096 transitions. [2021-07-09 18:43:29,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:29,316 INFO L276 IsEmpty]: Start isEmpty. Operand 44150 states and 170096 transitions. [2021-07-09 18:43:29,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:43:29,399 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:29,400 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:29,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4169,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:29,600 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:29,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:29,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1972807316, now seen corresponding path program 159 times [2021-07-09 18:43:29,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:29,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836394009] [2021-07-09 18:43:29,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:29,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:29,639 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:29,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:29,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836394009] [2021-07-09 18:43:29,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836394009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:29,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144836250] [2021-07-09 18:43:29,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:29,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:43:29,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:29,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:43:29,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:29,750 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:29,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144836250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:29,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:29,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 18:43:29,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871962294] [2021-07-09 18:43:29,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:43:29,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:29,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:43:29,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:43:29,751 INFO L87 Difference]: Start difference. First operand 44150 states and 170096 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:30,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:30,930 INFO L93 Difference]: Finished difference Result 58684 states and 220551 transitions. [2021-07-09 18:43:30,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 18:43:30,931 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:43:30,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:31,137 INFO L225 Difference]: With dead ends: 58684 [2021-07-09 18:43:31,137 INFO L226 Difference]: Without dead ends: 58644 [2021-07-09 18:43:31,138 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 505.6ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:43:31,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58644 states. [2021-07-09 18:43:32,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58644 to 44499. [2021-07-09 18:43:32,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44499 states, 44498 states have (on average 3.854667625511259) internal successors, (171525), 44498 states have internal predecessors, (171525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:32,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44499 states to 44499 states and 171525 transitions. [2021-07-09 18:43:32,695 INFO L78 Accepts]: Start accepts. Automaton has 44499 states and 171525 transitions. Word has length 28 [2021-07-09 18:43:32,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:32,695 INFO L482 AbstractCegarLoop]: Abstraction has 44499 states and 171525 transitions. [2021-07-09 18:43:32,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:32,696 INFO L276 IsEmpty]: Start isEmpty. Operand 44499 states and 171525 transitions. [2021-07-09 18:43:32,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:43:32,772 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:32,772 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:32,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4170 [2021-07-09 18:43:32,972 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:32,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:32,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1825824890, now seen corresponding path program 160 times [2021-07-09 18:43:32,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:32,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967422895] [2021-07-09 18:43:32,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:32,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:33,008 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:33,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:33,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967422895] [2021-07-09 18:43:33,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967422895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:33,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573595740] [2021-07-09 18:43:33,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:33,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:43:33,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:33,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:43:33,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:33,117 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:33,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573595740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:33,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:33,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:43:33,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995940316] [2021-07-09 18:43:33,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:43:33,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:33,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:43:33,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:43:33,118 INFO L87 Difference]: Start difference. First operand 44499 states and 171525 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:34,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:34,508 INFO L93 Difference]: Finished difference Result 71216 states and 265043 transitions. [2021-07-09 18:43:34,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 18:43:34,508 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:43:34,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:34,929 INFO L225 Difference]: With dead ends: 71216 [2021-07-09 18:43:34,929 INFO L226 Difference]: Without dead ends: 71216 [2021-07-09 18:43:34,929 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 571.0ms TimeCoverageRelationStatistics Valid=901, Invalid=3131, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:43:34,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71216 states. [2021-07-09 18:43:36,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71216 to 45665. [2021-07-09 18:43:36,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45665 states, 45664 states have (on average 3.8691310441485633) internal successors, (176680), 45664 states have internal predecessors, (176680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:36,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45665 states to 45665 states and 176680 transitions. [2021-07-09 18:43:36,460 INFO L78 Accepts]: Start accepts. Automaton has 45665 states and 176680 transitions. Word has length 28 [2021-07-09 18:43:36,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:36,460 INFO L482 AbstractCegarLoop]: Abstraction has 45665 states and 176680 transitions. [2021-07-09 18:43:36,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:36,460 INFO L276 IsEmpty]: Start isEmpty. Operand 45665 states and 176680 transitions. [2021-07-09 18:43:36,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:43:36,543 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:36,543 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:36,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4171,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:36,743 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:36,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:36,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1151103012, now seen corresponding path program 161 times [2021-07-09 18:43:36,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:36,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14487860] [2021-07-09 18:43:36,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:36,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:36,779 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:36,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:36,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14487860] [2021-07-09 18:43:36,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14487860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:36,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702687311] [2021-07-09 18:43:36,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:36,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:43:36,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:36,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:43:36,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:37,097 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:37,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702687311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:37,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:37,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:43:37,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139736019] [2021-07-09 18:43:37,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:43:37,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:37,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:43:37,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:43:37,100 INFO L87 Difference]: Start difference. First operand 45665 states and 176680 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:38,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:38,429 INFO L93 Difference]: Finished difference Result 65301 states and 246293 transitions. [2021-07-09 18:43:38,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 18:43:38,430 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:43:38,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:38,664 INFO L225 Difference]: With dead ends: 65301 [2021-07-09 18:43:38,665 INFO L226 Difference]: Without dead ends: 65301 [2021-07-09 18:43:38,665 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 713.9ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:43:38,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65301 states. [2021-07-09 18:43:40,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65301 to 45695. [2021-07-09 18:43:40,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45695 states, 45694 states have (on average 3.8689324637808027) internal successors, (176787), 45694 states have internal predecessors, (176787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:40,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45695 states to 45695 states and 176787 transitions. [2021-07-09 18:43:40,422 INFO L78 Accepts]: Start accepts. Automaton has 45695 states and 176787 transitions. Word has length 28 [2021-07-09 18:43:40,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:40,422 INFO L482 AbstractCegarLoop]: Abstraction has 45695 states and 176787 transitions. [2021-07-09 18:43:40,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:40,422 INFO L276 IsEmpty]: Start isEmpty. Operand 45695 states and 176787 transitions. [2021-07-09 18:43:40,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:43:40,513 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:40,513 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:40,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4172 [2021-07-09 18:43:40,713 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:40,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:40,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1490504108, now seen corresponding path program 162 times [2021-07-09 18:43:40,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:40,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767612730] [2021-07-09 18:43:40,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:40,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:40,763 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:40,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:40,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767612730] [2021-07-09 18:43:40,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767612730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:40,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579122554] [2021-07-09 18:43:40,763 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:40,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:43:40,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:40,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:43:40,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:40,883 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:40,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579122554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:40,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:40,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:43:40,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409780973] [2021-07-09 18:43:40,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:43:40,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:40,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:43:40,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:43:40,884 INFO L87 Difference]: Start difference. First operand 45695 states and 176787 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:42,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:42,655 INFO L93 Difference]: Finished difference Result 66159 states and 248729 transitions. [2021-07-09 18:43:42,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-07-09 18:43:42,655 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:43:42,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:43,201 INFO L225 Difference]: With dead ends: 66159 [2021-07-09 18:43:43,202 INFO L226 Difference]: Without dead ends: 66159 [2021-07-09 18:43:43,202 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 871.0ms TimeCoverageRelationStatistics Valid=1557, Invalid=5925, Unknown=0, NotChecked=0, Total=7482 [2021-07-09 18:43:43,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66159 states. [2021-07-09 18:43:44,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66159 to 45959. [2021-07-09 18:43:44,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45959 states, 45958 states have (on average 3.8653770834239958) internal successors, (177645), 45958 states have internal predecessors, (177645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:44,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45959 states to 45959 states and 177645 transitions. [2021-07-09 18:43:44,857 INFO L78 Accepts]: Start accepts. Automaton has 45959 states and 177645 transitions. Word has length 28 [2021-07-09 18:43:44,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:44,857 INFO L482 AbstractCegarLoop]: Abstraction has 45959 states and 177645 transitions. [2021-07-09 18:43:44,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:44,857 INFO L276 IsEmpty]: Start isEmpty. Operand 45959 states and 177645 transitions. [2021-07-09 18:43:44,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:43:44,948 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:44,948 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:45,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4173 [2021-07-09 18:43:45,149 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:45,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:45,149 INFO L82 PathProgramCache]: Analyzing trace with hash 152535046, now seen corresponding path program 163 times [2021-07-09 18:43:45,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:45,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252499926] [2021-07-09 18:43:45,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:45,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:45,388 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-07-09 18:43:45,407 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:45,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:45,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252499926] [2021-07-09 18:43:45,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252499926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:45,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505775015] [2021-07-09 18:43:45,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:43:45,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:45,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:43:45,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:45,552 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:45,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505775015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:45,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:45,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:43:45,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214003997] [2021-07-09 18:43:45,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:43:45,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:45,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:43:45,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:43:45,553 INFO L87 Difference]: Start difference. First operand 45959 states and 177645 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:47,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:47,084 INFO L93 Difference]: Finished difference Result 65371 states and 246494 transitions. [2021-07-09 18:43:47,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 18:43:47,085 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:43:47,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:47,335 INFO L225 Difference]: With dead ends: 65371 [2021-07-09 18:43:47,335 INFO L226 Difference]: Without dead ends: 65367 [2021-07-09 18:43:47,336 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 902.5ms TimeCoverageRelationStatistics Valid=1139, Invalid=3831, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:43:47,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65367 states. [2021-07-09 18:43:48,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65367 to 45595. [2021-07-09 18:43:48,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45595 states, 45594 states have (on average 3.8691275167785233) internal successors, (176409), 45594 states have internal predecessors, (176409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:48,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45595 states to 45595 states and 176409 transitions. [2021-07-09 18:43:48,930 INFO L78 Accepts]: Start accepts. Automaton has 45595 states and 176409 transitions. Word has length 28 [2021-07-09 18:43:48,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:48,930 INFO L482 AbstractCegarLoop]: Abstraction has 45595 states and 176409 transitions. [2021-07-09 18:43:48,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:48,930 INFO L276 IsEmpty]: Start isEmpty. Operand 45595 states and 176409 transitions. [2021-07-09 18:43:49,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:43:49,011 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:49,011 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:49,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4174,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:49,212 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:49,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:49,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1936993134, now seen corresponding path program 164 times [2021-07-09 18:43:49,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:49,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428055246] [2021-07-09 18:43:49,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:49,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:49,248 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:49,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:49,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428055246] [2021-07-09 18:43:49,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428055246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:49,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968866850] [2021-07-09 18:43:49,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:49,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:43:49,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:49,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:43:49,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:49,360 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:49,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968866850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:49,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:49,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:43:49,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148797981] [2021-07-09 18:43:49,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:43:49,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:49,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:43:49,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:43:49,361 INFO L87 Difference]: Start difference. First operand 45595 states and 176409 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:50,036 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-07-09 18:43:50,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:50,414 INFO L93 Difference]: Finished difference Result 59692 states and 226868 transitions. [2021-07-09 18:43:50,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:43:50,415 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:43:50,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:50,618 INFO L225 Difference]: With dead ends: 59692 [2021-07-09 18:43:50,618 INFO L226 Difference]: Without dead ends: 59692 [2021-07-09 18:43:50,619 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 603.2ms TimeCoverageRelationStatistics Valid=608, Invalid=2148, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:43:50,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59692 states. [2021-07-09 18:43:51,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59692 to 45611. [2021-07-09 18:43:52,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45611 states, 45610 states have (on average 3.8710151282613463) internal successors, (176557), 45610 states have internal predecessors, (176557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:52,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45611 states to 45611 states and 176557 transitions. [2021-07-09 18:43:52,176 INFO L78 Accepts]: Start accepts. Automaton has 45611 states and 176557 transitions. Word has length 28 [2021-07-09 18:43:52,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:52,176 INFO L482 AbstractCegarLoop]: Abstraction has 45611 states and 176557 transitions. [2021-07-09 18:43:52,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:52,176 INFO L276 IsEmpty]: Start isEmpty. Operand 45611 states and 176557 transitions. [2021-07-09 18:43:52,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:43:52,258 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:52,259 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:52,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4175 [2021-07-09 18:43:52,459 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:52,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:52,459 INFO L82 PathProgramCache]: Analyzing trace with hash -756673454, now seen corresponding path program 165 times [2021-07-09 18:43:52,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:52,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556446620] [2021-07-09 18:43:52,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:52,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:52,507 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:52,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:52,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556446620] [2021-07-09 18:43:52,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556446620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:52,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236868882] [2021-07-09 18:43:52,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:52,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:43:52,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:52,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:43:52,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:52,610 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:52,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236868882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:52,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:52,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:43:52,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406192962] [2021-07-09 18:43:52,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:43:52,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:52,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:43:52,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:43:52,611 INFO L87 Difference]: Start difference. First operand 45611 states and 176557 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:53,231 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-07-09 18:43:53,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:53,531 INFO L93 Difference]: Finished difference Result 59006 states and 224993 transitions. [2021-07-09 18:43:53,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:43:53,531 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:43:53,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:53,726 INFO L225 Difference]: With dead ends: 59006 [2021-07-09 18:43:53,726 INFO L226 Difference]: Without dead ends: 58994 [2021-07-09 18:43:53,727 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 489.0ms TimeCoverageRelationStatistics Valid=448, Invalid=1532, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:43:53,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58994 states. [2021-07-09 18:43:54,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58994 to 45545. [2021-07-09 18:43:55,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45545 states, 45544 states have (on average 3.8721675742139468) internal successors, (176354), 45544 states have internal predecessors, (176354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:55,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45545 states to 45545 states and 176354 transitions. [2021-07-09 18:43:55,300 INFO L78 Accepts]: Start accepts. Automaton has 45545 states and 176354 transitions. Word has length 28 [2021-07-09 18:43:55,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:55,300 INFO L482 AbstractCegarLoop]: Abstraction has 45545 states and 176354 transitions. [2021-07-09 18:43:55,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:55,300 INFO L276 IsEmpty]: Start isEmpty. Operand 45545 states and 176354 transitions. [2021-07-09 18:43:55,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:43:55,382 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:55,382 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:55,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4176 [2021-07-09 18:43:55,583 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:55,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:55,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1537074702, now seen corresponding path program 166 times [2021-07-09 18:43:55,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:55,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219074879] [2021-07-09 18:43:55,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:55,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:55,621 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:55,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:55,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219074879] [2021-07-09 18:43:55,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219074879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:55,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565632594] [2021-07-09 18:43:55,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:55,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:43:55,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:55,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:43:55,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:55,732 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:55,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565632594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:55,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:55,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:43:55,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755948327] [2021-07-09 18:43:55,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:43:55,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:55,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:43:55,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:43:55,733 INFO L87 Difference]: Start difference. First operand 45545 states and 176354 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:56,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:56,556 INFO L93 Difference]: Finished difference Result 50032 states and 191152 transitions. [2021-07-09 18:43:56,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:43:56,557 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:43:56,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:56,712 INFO L225 Difference]: With dead ends: 50032 [2021-07-09 18:43:56,712 INFO L226 Difference]: Without dead ends: 50032 [2021-07-09 18:43:56,713 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 298.0ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:43:56,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50032 states. [2021-07-09 18:43:57,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50032 to 45753. [2021-07-09 18:43:57,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45753 states, 45752 states have (on average 3.86968875677566) internal successors, (177046), 45752 states have internal predecessors, (177046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:57,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45753 states to 45753 states and 177046 transitions. [2021-07-09 18:43:57,965 INFO L78 Accepts]: Start accepts. Automaton has 45753 states and 177046 transitions. Word has length 28 [2021-07-09 18:43:57,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:57,965 INFO L482 AbstractCegarLoop]: Abstraction has 45753 states and 177046 transitions. [2021-07-09 18:43:57,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:57,965 INFO L276 IsEmpty]: Start isEmpty. Operand 45753 states and 177046 transitions. [2021-07-09 18:43:58,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:43:58,046 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:58,046 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:58,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4177 [2021-07-09 18:43:58,247 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:58,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:58,247 INFO L82 PathProgramCache]: Analyzing trace with hash 538506736, now seen corresponding path program 167 times [2021-07-09 18:43:58,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:58,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958504889] [2021-07-09 18:43:58,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:58,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:58,280 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:58,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:58,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958504889] [2021-07-09 18:43:58,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958504889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:58,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883556880] [2021-07-09 18:43:58,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:58,303 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:43:58,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:58,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:43:58,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:58,380 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:58,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883556880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:58,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:58,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:43:58,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006865854] [2021-07-09 18:43:58,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:43:58,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:58,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:43:58,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:43:58,381 INFO L87 Difference]: Start difference. First operand 45753 states and 177046 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:58,755 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-07-09 18:43:59,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:59,151 INFO L93 Difference]: Finished difference Result 49879 states and 190754 transitions. [2021-07-09 18:43:59,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:43:59,152 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:43:59,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:59,314 INFO L225 Difference]: With dead ends: 49879 [2021-07-09 18:43:59,314 INFO L226 Difference]: Without dead ends: 49875 [2021-07-09 18:43:59,314 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 415.8ms TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:43:59,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49875 states. [2021-07-09 18:44:00,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49875 to 45693. [2021-07-09 18:44:00,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45693 states, 45692 states have (on average 3.8705681519740875) internal successors, (176854), 45692 states have internal predecessors, (176854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:00,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45693 states to 45693 states and 176854 transitions. [2021-07-09 18:44:00,822 INFO L78 Accepts]: Start accepts. Automaton has 45693 states and 176854 transitions. Word has length 28 [2021-07-09 18:44:00,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:00,822 INFO L482 AbstractCegarLoop]: Abstraction has 45693 states and 176854 transitions. [2021-07-09 18:44:00,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:00,822 INFO L276 IsEmpty]: Start isEmpty. Operand 45693 states and 176854 transitions. [2021-07-09 18:44:00,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:44:00,923 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:00,923 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:44:01,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4178 [2021-07-09 18:44:01,124 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:01,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:01,124 INFO L82 PathProgramCache]: Analyzing trace with hash 508703680, now seen corresponding path program 78 times [2021-07-09 18:44:01,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:01,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861176163] [2021-07-09 18:44:01,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:01,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:01,160 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:01,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:01,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861176163] [2021-07-09 18:44:01,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861176163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:01,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642059814] [2021-07-09 18:44:01,161 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:01,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:44:01,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:01,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:44:01,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:01,233 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:01,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642059814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:01,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:01,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-09 18:44:01,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133725692] [2021-07-09 18:44:01,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:44:01,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:01,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:44:01,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:44:01,233 INFO L87 Difference]: Start difference. First operand 45693 states and 176854 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:02,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:02,017 INFO L93 Difference]: Finished difference Result 49934 states and 190867 transitions. [2021-07-09 18:44:02,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:44:02,018 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:44:02,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:02,171 INFO L225 Difference]: With dead ends: 49934 [2021-07-09 18:44:02,171 INFO L226 Difference]: Without dead ends: 49934 [2021-07-09 18:44:02,172 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 198.2ms TimeCoverageRelationStatistics Valid=275, Invalid=781, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:44:02,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49934 states. [2021-07-09 18:44:03,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49934 to 45797. [2021-07-09 18:44:03,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45797 states, 45796 states have (on average 3.8688531749497774) internal successors, (177178), 45796 states have internal predecessors, (177178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:03,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45797 states to 45797 states and 177178 transitions. [2021-07-09 18:44:03,423 INFO L78 Accepts]: Start accepts. Automaton has 45797 states and 177178 transitions. Word has length 28 [2021-07-09 18:44:03,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:03,424 INFO L482 AbstractCegarLoop]: Abstraction has 45797 states and 177178 transitions. [2021-07-09 18:44:03,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:03,424 INFO L276 IsEmpty]: Start isEmpty. Operand 45797 states and 177178 transitions. [2021-07-09 18:44:03,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:44:03,506 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:03,506 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:44:03,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4179,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:03,707 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:03,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:03,707 INFO L82 PathProgramCache]: Analyzing trace with hash -751583464, now seen corresponding path program 79 times [2021-07-09 18:44:03,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:03,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812100632] [2021-07-09 18:44:03,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:03,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:03,743 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:03,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:03,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812100632] [2021-07-09 18:44:03,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812100632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:03,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364180827] [2021-07-09 18:44:03,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:03,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:03,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:44:03,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:03,850 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:03,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364180827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:03,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:03,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 18:44:03,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194545707] [2021-07-09 18:44:03,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:44:03,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:03,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:44:03,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:44:03,851 INFO L87 Difference]: Start difference. First operand 45797 states and 177178 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:04,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:04,625 INFO L93 Difference]: Finished difference Result 56721 states and 216081 transitions. [2021-07-09 18:44:04,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:44:04,626 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:44:04,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:04,810 INFO L225 Difference]: With dead ends: 56721 [2021-07-09 18:44:04,810 INFO L226 Difference]: Without dead ends: 56631 [2021-07-09 18:44:04,810 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 242.8ms TimeCoverageRelationStatistics Valid=306, Invalid=954, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:44:04,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56631 states. [2021-07-09 18:44:05,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56631 to 45626. [2021-07-09 18:44:06,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45626 states, 45625 states have (on average 3.866717808219178) internal successors, (176419), 45625 states have internal predecessors, (176419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:06,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45626 states to 45626 states and 176419 transitions. [2021-07-09 18:44:06,326 INFO L78 Accepts]: Start accepts. Automaton has 45626 states and 176419 transitions. Word has length 28 [2021-07-09 18:44:06,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:06,327 INFO L482 AbstractCegarLoop]: Abstraction has 45626 states and 176419 transitions. [2021-07-09 18:44:06,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:06,327 INFO L276 IsEmpty]: Start isEmpty. Operand 45626 states and 176419 transitions. [2021-07-09 18:44:06,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:44:06,432 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:06,432 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:44:06,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4180,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:06,632 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:06,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:06,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1414052632, now seen corresponding path program 80 times [2021-07-09 18:44:06,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:06,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178840296] [2021-07-09 18:44:06,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:06,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:06,663 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:44:06,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:06,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178840296] [2021-07-09 18:44:06,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178840296] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:06,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680612179] [2021-07-09 18:44:06,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:06,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:44:06,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:06,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:44:06,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:06,731 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:44:06,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680612179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:06,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:06,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 18:44:06,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854900497] [2021-07-09 18:44:06,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:44:06,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:06,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:44:06,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:44:06,732 INFO L87 Difference]: Start difference. First operand 45626 states and 176419 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:07,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:07,203 INFO L93 Difference]: Finished difference Result 50119 states and 191428 transitions. [2021-07-09 18:44:07,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:44:07,203 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:44:07,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:07,573 INFO L225 Difference]: With dead ends: 50119 [2021-07-09 18:44:07,573 INFO L226 Difference]: Without dead ends: 50107 [2021-07-09 18:44:07,573 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 135.2ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:44:07,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50107 states. [2021-07-09 18:44:08,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50107 to 45780. [2021-07-09 18:44:08,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45780 states, 45779 states have (on average 3.864523034579174) internal successors, (176914), 45779 states have internal predecessors, (176914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:08,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45780 states to 45780 states and 176914 transitions. [2021-07-09 18:44:08,794 INFO L78 Accepts]: Start accepts. Automaton has 45780 states and 176914 transitions. Word has length 28 [2021-07-09 18:44:08,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:08,794 INFO L482 AbstractCegarLoop]: Abstraction has 45780 states and 176914 transitions. [2021-07-09 18:44:08,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:08,794 INFO L276 IsEmpty]: Start isEmpty. Operand 45780 states and 176914 transitions. [2021-07-09 18:44:08,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:44:08,871 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:08,871 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:44:09,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4181,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:09,077 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:09,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:09,077 INFO L82 PathProgramCache]: Analyzing trace with hash 421559068, now seen corresponding path program 81 times [2021-07-09 18:44:09,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:09,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210283700] [2021-07-09 18:44:09,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:09,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:09,112 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:09,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:09,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210283700] [2021-07-09 18:44:09,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210283700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:09,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022314127] [2021-07-09 18:44:09,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:09,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:44:09,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:09,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:44:09,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:09,179 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:09,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022314127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:09,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:09,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-09 18:44:09,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362726531] [2021-07-09 18:44:09,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:44:09,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:09,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:44:09,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:44:09,180 INFO L87 Difference]: Start difference. First operand 45780 states and 176914 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:09,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:09,857 INFO L93 Difference]: Finished difference Result 50083 states and 191344 transitions. [2021-07-09 18:44:09,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:44:09,857 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:44:09,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:10,019 INFO L225 Difference]: With dead ends: 50083 [2021-07-09 18:44:10,019 INFO L226 Difference]: Without dead ends: 50063 [2021-07-09 18:44:10,019 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 153.6ms TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:44:10,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50063 states. [2021-07-09 18:44:11,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50063 to 45780. [2021-07-09 18:44:11,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45780 states, 45779 states have (on average 3.8644356582712596) internal successors, (176910), 45779 states have internal predecessors, (176910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:11,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45780 states to 45780 states and 176910 transitions. [2021-07-09 18:44:11,272 INFO L78 Accepts]: Start accepts. Automaton has 45780 states and 176910 transitions. Word has length 28 [2021-07-09 18:44:11,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:11,272 INFO L482 AbstractCegarLoop]: Abstraction has 45780 states and 176910 transitions. [2021-07-09 18:44:11,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:11,272 INFO L276 IsEmpty]: Start isEmpty. Operand 45780 states and 176910 transitions. [2021-07-09 18:44:11,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:44:11,351 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:11,351 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:44:11,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4182 [2021-07-09 18:44:11,552 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:11,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:11,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1989119940, now seen corresponding path program 168 times [2021-07-09 18:44:11,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:11,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849136125] [2021-07-09 18:44:11,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:11,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:11,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:11,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:11,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849136125] [2021-07-09 18:44:11,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849136125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:11,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889349782] [2021-07-09 18:44:11,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:11,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:44:11,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:11,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:44:11,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:11,665 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:11,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889349782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:11,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:11,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:44:11,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403642068] [2021-07-09 18:44:11,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:44:11,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:11,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:44:11,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:44:11,666 INFO L87 Difference]: Start difference. First operand 45780 states and 176910 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:12,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:12,342 INFO L93 Difference]: Finished difference Result 50741 states and 194475 transitions. [2021-07-09 18:44:12,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:44:12,342 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:44:12,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:12,503 INFO L225 Difference]: With dead ends: 50741 [2021-07-09 18:44:12,504 INFO L226 Difference]: Without dead ends: 50728 [2021-07-09 18:44:12,504 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 135.7ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:44:12,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50728 states. [2021-07-09 18:44:13,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50728 to 48513. [2021-07-09 18:44:13,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48513 states, 48512 states have (on average 3.873330310026385) internal successors, (187903), 48512 states have internal predecessors, (187903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:14,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48513 states to 48513 states and 187903 transitions. [2021-07-09 18:44:14,022 INFO L78 Accepts]: Start accepts. Automaton has 48513 states and 187903 transitions. Word has length 28 [2021-07-09 18:44:14,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:14,022 INFO L482 AbstractCegarLoop]: Abstraction has 48513 states and 187903 transitions. [2021-07-09 18:44:14,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:14,022 INFO L276 IsEmpty]: Start isEmpty. Operand 48513 states and 187903 transitions. [2021-07-09 18:44:14,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:44:14,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:14,110 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:44:14,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4183 [2021-07-09 18:44:14,310 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:14,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:14,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1306375610, now seen corresponding path program 169 times [2021-07-09 18:44:14,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:14,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690994593] [2021-07-09 18:44:14,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:14,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:14,347 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:14,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:14,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690994593] [2021-07-09 18:44:14,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690994593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:14,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551810901] [2021-07-09 18:44:14,347 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:14,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:14,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:44:14,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:14,431 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:14,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551810901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:14,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:14,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:44:14,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291003844] [2021-07-09 18:44:14,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:44:14,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:14,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:44:14,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:44:14,432 INFO L87 Difference]: Start difference. First operand 48513 states and 187903 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:15,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:15,159 INFO L93 Difference]: Finished difference Result 54090 states and 205931 transitions. [2021-07-09 18:44:15,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:44:15,159 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:44:15,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:15,325 INFO L225 Difference]: With dead ends: 54090 [2021-07-09 18:44:15,325 INFO L226 Difference]: Without dead ends: 54090 [2021-07-09 18:44:15,326 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 151.2ms TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:44:15,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54090 states. [2021-07-09 18:44:16,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54090 to 43050. [2021-07-09 18:44:16,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43050 states, 43049 states have (on average 3.8601593532950824) internal successors, (166176), 43049 states have internal predecessors, (166176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:16,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43050 states to 43050 states and 166176 transitions. [2021-07-09 18:44:16,548 INFO L78 Accepts]: Start accepts. Automaton has 43050 states and 166176 transitions. Word has length 28 [2021-07-09 18:44:16,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:16,548 INFO L482 AbstractCegarLoop]: Abstraction has 43050 states and 166176 transitions. [2021-07-09 18:44:16,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:16,548 INFO L276 IsEmpty]: Start isEmpty. Operand 43050 states and 166176 transitions. [2021-07-09 18:44:16,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:44:16,624 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:16,624 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:44:16,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4184 [2021-07-09 18:44:16,824 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:16,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:16,824 INFO L82 PathProgramCache]: Analyzing trace with hash 986257146, now seen corresponding path program 170 times [2021-07-09 18:44:16,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:16,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055295120] [2021-07-09 18:44:16,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:16,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:16,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:16,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:16,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055295120] [2021-07-09 18:44:16,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055295120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:16,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660570480] [2021-07-09 18:44:16,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:16,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:44:16,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:16,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:44:16,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:16,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:16,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660570480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:16,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:16,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:44:16,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344235937] [2021-07-09 18:44:16,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:44:16,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:16,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:44:16,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:44:16,941 INFO L87 Difference]: Start difference. First operand 43050 states and 166176 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:17,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:17,636 INFO L93 Difference]: Finished difference Result 47933 states and 182630 transitions. [2021-07-09 18:44:17,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:44:17,636 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:44:17,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:17,780 INFO L225 Difference]: With dead ends: 47933 [2021-07-09 18:44:17,781 INFO L226 Difference]: Without dead ends: 47933 [2021-07-09 18:44:17,781 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 195.7ms TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:44:17,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47933 states. [2021-07-09 18:44:18,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47933 to 43883. [2021-07-09 18:44:18,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43883 states, 43882 states have (on average 3.858848730686842) internal successors, (169334), 43882 states have internal predecessors, (169334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:18,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43883 states to 43883 states and 169334 transitions. [2021-07-09 18:44:18,932 INFO L78 Accepts]: Start accepts. Automaton has 43883 states and 169334 transitions. Word has length 28 [2021-07-09 18:44:18,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:18,932 INFO L482 AbstractCegarLoop]: Abstraction has 43883 states and 169334 transitions. [2021-07-09 18:44:18,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:18,932 INFO L276 IsEmpty]: Start isEmpty. Operand 43883 states and 169334 transitions. [2021-07-09 18:44:19,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:44:19,009 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:19,009 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:44:19,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4185 [2021-07-09 18:44:19,210 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:19,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:19,210 INFO L82 PathProgramCache]: Analyzing trace with hash -22913030, now seen corresponding path program 171 times [2021-07-09 18:44:19,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:19,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630851924] [2021-07-09 18:44:19,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:19,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:19,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:19,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:19,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630851924] [2021-07-09 18:44:19,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630851924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:19,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726659895] [2021-07-09 18:44:19,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:19,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:44:19,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:19,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:44:19,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:19,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:19,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726659895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:19,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:19,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-09 18:44:19,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879117239] [2021-07-09 18:44:19,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:44:19,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:19,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:44:19,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:44:19,329 INFO L87 Difference]: Start difference. First operand 43883 states and 169334 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:19,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:19,970 INFO L93 Difference]: Finished difference Result 45643 states and 175210 transitions. [2021-07-09 18:44:19,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:44:19,971 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:44:19,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:20,107 INFO L225 Difference]: With dead ends: 45643 [2021-07-09 18:44:20,107 INFO L226 Difference]: Without dead ends: 45643 [2021-07-09 18:44:20,107 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 133.3ms TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:44:20,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45643 states. [2021-07-09 18:44:21,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45643 to 43891. [2021-07-09 18:44:21,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43891 states, 43890 states have (on average 3.8586921850079743) internal successors, (169358), 43890 states have internal predecessors, (169358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:21,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43891 states to 43891 states and 169358 transitions. [2021-07-09 18:44:21,344 INFO L78 Accepts]: Start accepts. Automaton has 43891 states and 169358 transitions. Word has length 28 [2021-07-09 18:44:21,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:21,344 INFO L482 AbstractCegarLoop]: Abstraction has 43891 states and 169358 transitions. [2021-07-09 18:44:21,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:21,347 INFO L276 IsEmpty]: Start isEmpty. Operand 43891 states and 169358 transitions. [2021-07-09 18:44:21,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:44:21,433 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:21,433 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:44:21,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4186 [2021-07-09 18:44:21,640 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:21,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:21,641 INFO L82 PathProgramCache]: Analyzing trace with hash -120181494, now seen corresponding path program 172 times [2021-07-09 18:44:21,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:21,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511654637] [2021-07-09 18:44:21,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:21,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:21,676 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:21,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:21,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511654637] [2021-07-09 18:44:21,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511654637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:21,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368002621] [2021-07-09 18:44:21,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:21,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:44:21,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:21,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:44:21,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:21,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:21,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368002621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:21,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:21,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 18:44:21,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829299073] [2021-07-09 18:44:21,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:44:21,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:21,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:44:21,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:44:21,763 INFO L87 Difference]: Start difference. First operand 43891 states and 169358 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:22,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:22,378 INFO L93 Difference]: Finished difference Result 45363 states and 174288 transitions. [2021-07-09 18:44:22,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:44:22,379 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:44:22,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:22,516 INFO L225 Difference]: With dead ends: 45363 [2021-07-09 18:44:22,516 INFO L226 Difference]: Without dead ends: 45363 [2021-07-09 18:44:22,516 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 132.7ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:44:22,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45363 states. [2021-07-09 18:44:23,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45363 to 43785. [2021-07-09 18:44:23,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43785 states, 43784 states have (on average 3.858350082221816) internal successors, (168934), 43784 states have internal predecessors, (168934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:23,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43785 states to 43785 states and 168934 transitions. [2021-07-09 18:44:23,646 INFO L78 Accepts]: Start accepts. Automaton has 43785 states and 168934 transitions. Word has length 28 [2021-07-09 18:44:23,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:23,646 INFO L482 AbstractCegarLoop]: Abstraction has 43785 states and 168934 transitions. [2021-07-09 18:44:23,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:23,646 INFO L276 IsEmpty]: Start isEmpty. Operand 43785 states and 168934 transitions. [2021-07-09 18:44:23,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:44:23,725 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:23,725 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:44:23,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4187,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:23,926 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:23,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:23,926 INFO L82 PathProgramCache]: Analyzing trace with hash -915745990, now seen corresponding path program 173 times [2021-07-09 18:44:23,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:23,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019831864] [2021-07-09 18:44:23,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:23,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:24,302 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 93 [2021-07-09 18:44:24,416 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 56 [2021-07-09 18:44:24,573 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2021-07-09 18:44:24,714 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2021-07-09 18:44:24,868 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2021-07-09 18:44:25,017 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 42 [2021-07-09 18:44:25,091 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:25,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:25,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019831864] [2021-07-09 18:44:25,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019831864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:25,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54199199] [2021-07-09 18:44:25,092 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:25,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:44:25,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:25,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:44:25,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:25,345 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-07-09 18:44:25,551 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-07-09 18:44:25,769 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-07-09 18:44:26,265 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 107 [2021-07-09 18:44:26,480 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-07-09 18:44:26,677 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-07-09 18:44:26,960 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-07-09 18:44:27,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:27,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:27,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:27,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:27,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:44:27,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:27,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:27,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:27,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:27,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:27,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:44:27,160 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:27,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:27,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:27,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:27,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:27,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:44:27,173 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:27,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:27,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:27,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:27,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:27,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:44:27,186 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:27,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:27,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:27,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:27,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:27,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:44:27,199 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:27,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:27,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:27,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:27,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:27,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:27,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:44:27,213 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:27,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:27,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:27,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:27,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:27,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:44:27,226 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:27,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:27,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:27,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:27,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:44:27,235 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:27,590 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 113 [2021-07-09 18:44:27,590 INFO L628 ElimStorePlain]: treesize reduction 98, result has 81.7 percent of original size [2021-07-09 18:44:27,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:27,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:27,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:27,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:27,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:44:27,602 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:27,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:27,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:27,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:27,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:27,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:44:27,613 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:27,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:27,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:27,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:27,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:27,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:44:27,624 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:27,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:27,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:27,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:27,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:27,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:44:27,634 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:27,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:27,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:27,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:27,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:27,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:44:27,644 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:27,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:27,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:27,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:27,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:27,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:44:27,655 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:27,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:27,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:27,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:27,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:27,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:44:27,665 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:27,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:27,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:27,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:27,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:44:27,672 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:27,784 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-07-09 18:44:27,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:27,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 18 dim-0 vars, 2 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-07-09 18:44:27,791 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 20 variables, input treesize:725, output treesize:97 [2021-07-09 18:44:27,888 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:27,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54199199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:27,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:27,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 18:44:27,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187104087] [2021-07-09 18:44:27,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:44:27,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:27,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:44:27,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:44:27,889 INFO L87 Difference]: Start difference. First operand 43785 states and 168934 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:28,637 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 83 [2021-07-09 18:44:29,310 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 92 [2021-07-09 18:44:29,542 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 71 [2021-07-09 18:44:29,720 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 68 [2021-07-09 18:44:29,921 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 58 [2021-07-09 18:44:30,104 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2021-07-09 18:44:30,635 WARN L205 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 107 [2021-07-09 18:44:30,973 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 94 [2021-07-09 18:44:31,963 WARN L205 SmtUtils]: Spent 870.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 133 [2021-07-09 18:44:32,546 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 92 [2021-07-09 18:44:32,702 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-07-09 18:44:33,795 WARN L205 SmtUtils]: Spent 807.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 117 [2021-07-09 18:44:34,535 WARN L205 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 136 [2021-07-09 18:44:35,128 WARN L205 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 112 [2021-07-09 18:44:35,782 WARN L205 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 138 [2021-07-09 18:44:36,497 WARN L205 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 136 [2021-07-09 18:44:36,666 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 60 [2021-07-09 18:44:37,410 WARN L205 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 144 [2021-07-09 18:44:37,689 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 62 [2021-07-09 18:44:38,440 WARN L205 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 142 [2021-07-09 18:44:38,752 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 55 [2021-07-09 18:44:39,318 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2021-07-09 18:44:39,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:39,848 INFO L93 Difference]: Finished difference Result 51109 states and 190238 transitions. [2021-07-09 18:44:39,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:44:39,848 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:44:39,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:40,030 INFO L225 Difference]: With dead ends: 51109 [2021-07-09 18:44:40,030 INFO L226 Difference]: Without dead ends: 51049 [2021-07-09 18:44:40,030 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 12712.5ms TimeCoverageRelationStatistics Valid=557, Invalid=3103, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:44:40,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51049 states. [2021-07-09 18:44:41,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51049 to 43920. [2021-07-09 18:44:41,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43920 states, 43919 states have (on average 3.8575331860925797) internal successors, (169419), 43919 states have internal predecessors, (169419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:41,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43920 states to 43920 states and 169419 transitions. [2021-07-09 18:44:41,326 INFO L78 Accepts]: Start accepts. Automaton has 43920 states and 169419 transitions. Word has length 30 [2021-07-09 18:44:41,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:41,326 INFO L482 AbstractCegarLoop]: Abstraction has 43920 states and 169419 transitions. [2021-07-09 18:44:41,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:41,326 INFO L276 IsEmpty]: Start isEmpty. Operand 43920 states and 169419 transitions. [2021-07-09 18:44:41,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:44:41,418 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:41,418 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:44:41,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4188 [2021-07-09 18:44:41,618 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:41,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:41,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1350823290, now seen corresponding path program 174 times [2021-07-09 18:44:41,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:41,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156292348] [2021-07-09 18:44:41,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:41,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:41,996 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2021-07-09 18:44:42,145 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-07-09 18:44:42,450 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:42,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:42,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156292348] [2021-07-09 18:44:42,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156292348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:42,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502214689] [2021-07-09 18:44:42,450 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:42,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:44:42,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:42,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:44:42,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:43,248 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-07-09 18:44:43,531 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-07-09 18:44:44,213 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 134 [2021-07-09 18:44:44,483 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-07-09 18:44:45,525 WARN L205 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 181 [2021-07-09 18:44:45,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:45,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:45,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:45,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:45,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:45,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:45,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:45,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:45,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-07-09 18:44:45,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:45,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:45,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:45,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:45,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:45,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:45,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:45,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:44:45,797 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:46,540 WARN L205 SmtUtils]: Spent 743.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 217 [2021-07-09 18:44:46,541 INFO L628 ElimStorePlain]: treesize reduction 665, result has 42.2 percent of original size [2021-07-09 18:44:46,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:46,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:46,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:46,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:46,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:44:46,554 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:46,747 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2021-07-09 18:44:46,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:46,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:46,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:46,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:46,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:46,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:46,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:46,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:44:46,762 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:46,968 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2021-07-09 18:44:46,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:46,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:46,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:46,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:46,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:46,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:46,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:46,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2021-07-09 18:44:46,982 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:47,164 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2021-07-09 18:44:47,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:47,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:47,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:47,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:47,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:47,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:47,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:47,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:44:47,183 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:47,357 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2021-07-09 18:44:47,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:47,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:47,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:47,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:47,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:47,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:47,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:47,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:44:47,371 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:47,533 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2021-07-09 18:44:47,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:47,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:47,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:47,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:44:47,544 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:47,698 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-07-09 18:44:47,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:47,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:47,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:47,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:47,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:47,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:47,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:47,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:44:47,711 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:47,849 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-07-09 18:44:47,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:47,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:47,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:47,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:47,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:47,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:47,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:47,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:47,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:44:47,862 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:47,991 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-07-09 18:44:47,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:47,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:48,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:48,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-09 18:44:48,001 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:48,125 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-07-09 18:44:48,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:48,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:48,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:48,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:48,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:48,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:44:48,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:44:48,137 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:48,254 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-07-09 18:44:48,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:48,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 33 dim-0 vars, 11 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-07-09 18:44:48,263 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 44 variables, input treesize:1231, output treesize:100 [2021-07-09 18:44:48,366 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:48,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502214689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:48,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:48,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-09 18:44:48,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542810896] [2021-07-09 18:44:48,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:44:48,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:48,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:44:48,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:44:48,367 INFO L87 Difference]: Start difference. First operand 43920 states and 169419 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:48,536 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 35 [2021-07-09 18:44:48,837 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 52 [2021-07-09 18:44:49,171 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 110 [2021-07-09 18:44:49,324 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2021-07-09 18:44:50,353 WARN L205 SmtUtils]: Spent 841.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 128 [2021-07-09 18:44:50,871 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 86 [2021-07-09 18:44:51,126 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 73 [2021-07-09 18:44:51,447 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 86 [2021-07-09 18:44:52,789 WARN L205 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 174 DAG size of output: 161 [2021-07-09 18:44:53,807 WARN L205 SmtUtils]: Spent 912.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 148 [2021-07-09 18:44:54,025 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 82 [2021-07-09 18:44:54,221 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74