/usr/bin/java -Xmx16000000000 -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/sum-array-hom.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 07:04:14,395 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 07:04:14,397 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 07:04:14,433 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 07:04:14,510 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 [2021-06-05 07:04:14,543 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 07:04:14,543 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 07:04:14,544 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 07:04:14,544 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 07:04:14,546 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 07:04:14,546 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 07:04:14,546 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 07:04:14,546 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 07:04:14,547 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 07:04:14,547 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 07:04:14,547 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 07:04:14,548 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 07:04:14,548 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 07:04:14,548 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 07:04:14,548 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 07:04:14,548 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 07:04:14,548 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 07:04:14,548 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 07:04:14,548 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 07:04:14,548 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 07:04:14,549 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 07:04:14,549 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 07:04:14,549 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 07:04:14,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 07:04:14,549 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 07:04:14,549 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 07:04:14,550 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 07:04:14,550 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 07:04:14,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 07:04:14,550 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 07:04:14,550 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 07:04:14,550 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 07:04:14,855 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 07:04:14,884 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 07:04:14,885 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 07:04:14,886 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 07:04:14,887 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 07:04:14,888 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-array-hom.wvr.bpl [2021-06-05 07:04:14,888 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-array-hom.wvr.bpl' [2021-06-05 07:04:14,924 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 07:04:14,925 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 07:04:14,926 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 07:04:14,926 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 07:04:14,926 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 07:04:14,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:04:14" (1/1) ... [2021-06-05 07:04:14,948 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:04:14" (1/1) ... [2021-06-05 07:04:14,954 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 07:04:14,956 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 07:04:14,956 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 07:04:14,957 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 07:04:14,964 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:04:14" (1/1) ... [2021-06-05 07:04:14,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:04:14" (1/1) ... [2021-06-05 07:04:14,965 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:04:14" (1/1) ... [2021-06-05 07:04:14,965 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:04:14" (1/1) ... [2021-06-05 07:04:14,968 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:04:14" (1/1) ... [2021-06-05 07:04:14,973 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:04:14" (1/1) ... [2021-06-05 07:04:14,974 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:04:14" (1/1) ... [2021-06-05 07:04:14,975 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 07:04:14,975 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 07:04:14,976 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 07:04:14,976 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 07:04:14,978 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:04:14" (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 [2021-06-05 07:04:15,034 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 07:04:15,034 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 07:04:15,035 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 07:04:15,035 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 07:04:15,035 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 07:04:15,035 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 07:04:15,035 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 07:04:15,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 07:04:15,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 07:04:15,036 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 07:04:15,037 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 07:04:15,037 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 07:04:15,038 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 07:04:15,273 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 07:04:15,273 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 07:04:15,275 INFO L202 PluginConnector]: Adding new model sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 07:04:15 BoogieIcfgContainer [2021-06-05 07:04:15,275 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 07:04:15,276 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 07:04:15,276 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 07:04:15,279 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 07:04:15,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:04:14" (1/2) ... [2021-06-05 07:04:15,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fc6e34a and model type sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 07:04:15, skipping insertion in model container [2021-06-05 07:04:15,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 07:04:15" (2/2) ... [2021-06-05 07:04:15,281 INFO L111 eAbstractionObserver]: Analyzing ICFG sum-array-hom.wvr.bpl [2021-06-05 07:04:15,300 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 07:04:15,300 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 07:04:15,301 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 07:04:15,301 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 07:04:15,369 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 07:04:15,389 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 07:04:15,425 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 07:04:15,425 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 07:04:15,425 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 07:04:15,426 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 07:04:15,426 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 07:04:15,426 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 07:04:15,426 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 07:04:15,426 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 07:04:15,437 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-06-05 07:04:15,462 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:15,464 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:15,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 07:04:15,474 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:15,474 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:15,475 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:15,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:15,480 INFO L82 PathProgramCache]: Analyzing trace with hash -986458276, now seen corresponding path program 1 times [2021-06-05 07:04:15,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:15,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593107747] [2021-06-05 07:04:15,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:15,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:15,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:15,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:15,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593107747] [2021-06-05 07:04:15,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593107747] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:04:15,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:04:15,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 07:04:15,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657290737] [2021-06-05 07:04:15,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 07:04:15,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:15,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 07:04:15,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 07:04:15,657 INFO L87 Difference]: Start difference. First operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 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 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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) [2021-06-05 07:04:15,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:15,710 INFO L93 Difference]: Finished difference Result 154 states and 436 transitions. [2021-06-05 07:04:15,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 07:04:15,712 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 [2021-06-05 07:04:15,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:15,722 INFO L225 Difference]: With dead ends: 154 [2021-06-05 07:04:15,722 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 07:04:15,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:04:15,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 07:04:15,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 133. [2021-06-05 07:04:15,758 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) [2021-06-05 07:04:15,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-06-05 07:04:15,761 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 18 [2021-06-05 07:04:15,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:15,762 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-06-05 07:04:15,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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) [2021-06-05 07:04:15,762 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-06-05 07:04:15,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 07:04:15,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:15,766 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:15,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 07:04:15,766 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:15,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:15,767 INFO L82 PathProgramCache]: Analyzing trace with hash -433058596, now seen corresponding path program 1 times [2021-06-05 07:04:15,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:15,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841995658] [2021-06-05 07:04:15,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:15,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:15,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:04:15,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:15,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841995658] [2021-06-05 07:04:15,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841995658] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:04:15,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:04:15,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 07:04:15,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201543271] [2021-06-05 07:04:15,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 07:04:15,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:15,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 07:04:15,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 07:04:15,820 INFO L87 Difference]: Start difference. First operand 133 states and 374 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) [2021-06-05 07:04:15,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:15,852 INFO L93 Difference]: Finished difference Result 158 states and 448 transitions. [2021-06-05 07:04:15,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 07:04:15,853 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 [2021-06-05 07:04:15,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:15,855 INFO L225 Difference]: With dead ends: 158 [2021-06-05 07:04:15,855 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 07:04:15,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 07:04:15,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 07:04:15,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-06-05 07:04:15,869 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) [2021-06-05 07:04:15,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-06-05 07:04:15,871 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-06-05 07:04:15,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:15,871 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-06-05 07:04:15,871 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) [2021-06-05 07:04:15,871 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-06-05 07:04:15,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 07:04:15,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:15,873 INFO L521 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] [2021-06-05 07:04:15,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 07:04:15,873 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:15,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:15,874 INFO L82 PathProgramCache]: Analyzing trace with hash -483303622, now seen corresponding path program 1 times [2021-06-05 07:04:15,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:15,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909458802] [2021-06-05 07:04:15,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:15,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:16,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:16,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:16,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909458802] [2021-06-05 07:04:16,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909458802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:16,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463972072] [2021-06-05 07:04:16,241 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 [2021-06-05 07:04:16,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:16,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 07:04:16,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:16,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:04:16,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 7 [2021-06-05 07:04:16,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:16,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:16,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:16,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2021-06-05 07:04:16,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:16,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463972072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:16,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:16,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 07:04:16,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742307087] [2021-06-05 07:04:16,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:04:16,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:16,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:04:16,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:04:16,696 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 3.0) 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) [2021-06-05 07:04:16,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:16,947 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-06-05 07:04:16,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 07:04:16,948 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) 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 22 [2021-06-05 07:04:16,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:16,952 INFO L225 Difference]: With dead ends: 330 [2021-06-05 07:04:16,952 INFO L226 Difference]: Without dead ends: 315 [2021-06-05 07:04:16,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 358.5ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:04:16,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-06-05 07:04:16,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-06-05 07:04:16,979 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) [2021-06-05 07:04:16,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-06-05 07:04:16,981 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-06-05 07:04:16,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:16,981 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-06-05 07:04:16,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) 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) [2021-06-05 07:04:16,982 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-06-05 07:04:16,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 07:04:16,983 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:16,983 INFO L521 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] [2021-06-05 07:04:17,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 07:04:17,207 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:17,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:17,207 INFO L82 PathProgramCache]: Analyzing trace with hash -651112714, now seen corresponding path program 2 times [2021-06-05 07:04:17,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:17,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341657575] [2021-06-05 07:04:17,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:17,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:17,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:17,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:17,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341657575] [2021-06-05 07:04:17,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341657575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:17,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049357869] [2021-06-05 07:04:17,465 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 [2021-06-05 07:04:17,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:04:17,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:17,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 07:04:17,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:17,650 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:17,650 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 [2021-06-05 07:04:17,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:04:17,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:17,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:17,682 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:22 [2021-06-05 07:04:17,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:17,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049357869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:17,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:17,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-05 07:04:17,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055530718] [2021-06-05 07:04:17,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:04:17,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:17,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:04:17,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:04:17,768 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) 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) [2021-06-05 07:04:18,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:18,218 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-06-05 07:04:18,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 07:04:18,219 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) 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 22 [2021-06-05 07:04:18,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:18,222 INFO L225 Difference]: With dead ends: 374 [2021-06-05 07:04:18,222 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 07:04:18,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 478.5ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:04:18,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 07:04:18,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-06-05 07:04:18,240 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) [2021-06-05 07:04:18,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-06-05 07:04:18,245 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-06-05 07:04:18,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:18,245 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-06-05 07:04:18,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) 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) [2021-06-05 07:04:18,245 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-06-05 07:04:18,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 07:04:18,252 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:18,252 INFO L521 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] [2021-06-05 07:04:18,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:18,475 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:18,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:18,475 INFO L82 PathProgramCache]: Analyzing trace with hash -352339266, now seen corresponding path program 3 times [2021-06-05 07:04:18,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:18,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550512224] [2021-06-05 07:04:18,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:18,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:18,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:18,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:18,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550512224] [2021-06-05 07:04:18,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550512224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:18,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806725604] [2021-06-05 07:04:18,646 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 [2021-06-05 07:04:18,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 07:04:18,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:18,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 07:04:18,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:18,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:04:18,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:18,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:18,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:18,818 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-05 07:04:18,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:18,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806725604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:18,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:18,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 07:04:18,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087654677] [2021-06-05 07:04:18,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:04:18,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:18,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:04:18,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:04:18,847 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) 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) [2021-06-05 07:04:19,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:19,014 INFO L93 Difference]: Finished difference Result 296 states and 831 transitions. [2021-06-05 07:04:19,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:04:19,014 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) 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 22 [2021-06-05 07:04:19,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:19,016 INFO L225 Difference]: With dead ends: 296 [2021-06-05 07:04:19,017 INFO L226 Difference]: Without dead ends: 281 [2021-06-05 07:04:19,017 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 245.1ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:04:19,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-06-05 07:04:19,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-06-05 07:04:19,023 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) [2021-06-05 07:04:19,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-06-05 07:04:19,025 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-06-05 07:04:19,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:19,025 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-06-05 07:04:19,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) 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) [2021-06-05 07:04:19,025 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-06-05 07:04:19,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 07:04:19,026 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:19,026 INFO L521 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] [2021-06-05 07:04:19,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:19,241 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:19,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:19,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1218486334, now seen corresponding path program 4 times [2021-06-05 07:04:19,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:19,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939685481] [2021-06-05 07:04:19,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:19,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:19,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:19,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:19,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939685481] [2021-06-05 07:04:19,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939685481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:19,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616474396] [2021-06-05 07:04:19,416 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 [2021-06-05 07:04:19,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:04:19,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:19,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 07:04:19,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:19,542 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:19,543 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 [2021-06-05 07:04:19,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:04:19,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:19,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:19,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:22 [2021-06-05 07:04:19,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:19,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616474396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:19,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:19,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 07:04:19,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562935067] [2021-06-05 07:04:19,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:04:19,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:19,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:04:19,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:04:19,621 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) [2021-06-05 07:04:19,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:19,861 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-06-05 07:04:19,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 07:04:19,862 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 [2021-06-05 07:04:19,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:19,863 INFO L225 Difference]: With dead ends: 425 [2021-06-05 07:04:19,863 INFO L226 Difference]: Without dead ends: 410 [2021-06-05 07:04:19,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 284.8ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:04:19,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-05 07:04:19,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-06-05 07:04:19,871 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) [2021-06-05 07:04:19,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-06-05 07:04:19,872 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-06-05 07:04:19,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:19,872 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-06-05 07:04:19,873 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) [2021-06-05 07:04:19,873 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-06-05 07:04:19,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:04:19,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:19,874 INFO L521 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] [2021-06-05 07:04:20,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:20,089 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:20,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:20,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1613936552, now seen corresponding path program 5 times [2021-06-05 07:04:20,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:20,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781864481] [2021-06-05 07:04:20,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:20,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:20,136 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:20,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:20,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781864481] [2021-06-05 07:04:20,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781864481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:20,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52444536] [2021-06-05 07:04:20,136 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 [2021-06-05 07:04:20,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:04:20,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:20,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:20,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:20,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:20,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52444536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:20,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:20,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 07:04:20,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071148297] [2021-06-05 07:04:20,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:04:20,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:20,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:04:20,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:04:20,271 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) [2021-06-05 07:04:20,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:20,679 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-06-05 07:04:20,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:04:20,680 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 [2021-06-05 07:04:20,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:20,683 INFO L225 Difference]: With dead ends: 619 [2021-06-05 07:04:20,683 INFO L226 Difference]: Without dead ends: 619 [2021-06-05 07:04:20,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 251.4ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:04:20,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-06-05 07:04:20,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-06-05 07:04:20,692 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) [2021-06-05 07:04:20,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-06-05 07:04:20,693 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-06-05 07:04:20,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:20,694 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-06-05 07:04:20,694 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) [2021-06-05 07:04:20,694 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-06-05 07:04:20,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:04:20,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:20,695 INFO L521 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] [2021-06-05 07:04:20,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 07:04:20,909 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:20,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:20,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1704711900, now seen corresponding path program 6 times [2021-06-05 07:04:20,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:20,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056925721] [2021-06-05 07:04:20,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:20,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:20,953 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:20,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:20,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056925721] [2021-06-05 07:04:20,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056925721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:20,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495387004] [2021-06-05 07:04:20,954 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 [2021-06-05 07:04:20,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:04:20,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:20,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:20,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:21,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:21,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495387004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:21,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:21,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 07:04:21,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214371002] [2021-06-05 07:04:21,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:04:21,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:21,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:04:21,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:04:21,083 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) [2021-06-05 07:04:21,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:21,893 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-06-05 07:04:21,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 07:04:21,894 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 [2021-06-05 07:04:21,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:21,898 INFO L225 Difference]: With dead ends: 1078 [2021-06-05 07:04:21,899 INFO L226 Difference]: Without dead ends: 1078 [2021-06-05 07:04:21,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 513.6ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:04:21,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-05 07:04:21,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-06-05 07:04:21,911 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) [2021-06-05 07:04:21,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-06-05 07:04:21,912 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-06-05 07:04:21,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:21,913 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-06-05 07:04:21,913 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) [2021-06-05 07:04:21,913 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-06-05 07:04:21,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:04:21,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:21,914 INFO L521 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] [2021-06-05 07:04:22,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:22,136 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:22,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:22,137 INFO L82 PathProgramCache]: Analyzing trace with hash -2023303316, now seen corresponding path program 7 times [2021-06-05 07:04:22,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:22,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85690242] [2021-06-05 07:04:22,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:22,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:22,178 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:22,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:22,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85690242] [2021-06-05 07:04:22,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85690242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:22,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500222007] [2021-06-05 07:04:22,179 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 [2021-06-05 07:04:22,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:22,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:22,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:22,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:22,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500222007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:22,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:22,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 07:04:22,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109424838] [2021-06-05 07:04:22,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:04:22,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:22,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:04:22,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:04:22,338 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) [2021-06-05 07:04:23,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:23,089 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-06-05 07:04:23,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 07:04:23,090 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 [2021-06-05 07:04:23,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:23,094 INFO L225 Difference]: With dead ends: 951 [2021-06-05 07:04:23,094 INFO L226 Difference]: Without dead ends: 951 [2021-06-05 07:04:23,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 485.4ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:04:23,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-05 07:04:23,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-06-05 07:04:23,105 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) [2021-06-05 07:04:23,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-06-05 07:04:23,106 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-06-05 07:04:23,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:23,106 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-06-05 07:04:23,106 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) [2021-06-05 07:04:23,106 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-06-05 07:04:23,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:04:23,107 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:23,107 INFO L521 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] [2021-06-05 07:04:23,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:23,327 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:23,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:23,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1087164644, now seen corresponding path program 1 times [2021-06-05 07:04:23,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:23,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202521973] [2021-06-05 07:04:23,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:23,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:04:23,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:23,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202521973] [2021-06-05 07:04:23,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202521973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:23,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147628554] [2021-06-05 07:04:23,366 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 [2021-06-05 07:04:23,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:23,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 07:04:23,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:23,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:04:23,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147628554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:23,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:23,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 07:04:23,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109510518] [2021-06-05 07:04:23,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:04:23,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:23,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:04:23,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:04:23,458 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) [2021-06-05 07:04:23,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:23,571 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-06-05 07:04:23,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 07:04:23,572 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 [2021-06-05 07:04:23,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:23,575 INFO L225 Difference]: With dead ends: 669 [2021-06-05 07:04:23,575 INFO L226 Difference]: Without dead ends: 663 [2021-06-05 07:04:23,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:04:23,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-06-05 07:04:23,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-06-05 07:04:23,586 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) [2021-06-05 07:04:23,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-06-05 07:04:23,587 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-06-05 07:04:23,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:23,588 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-06-05 07:04:23,588 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) [2021-06-05 07:04:23,588 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-06-05 07:04:23,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:04:23,589 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:23,589 INFO L521 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] [2021-06-05 07:04:23,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 07:04:23,805 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:23,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:23,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1524133352, now seen corresponding path program 8 times [2021-06-05 07:04:23,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:23,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729531792] [2021-06-05 07:04:23,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:23,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:23,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:23,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:23,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729531792] [2021-06-05 07:04:23,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729531792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:23,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411148177] [2021-06-05 07:04:23,854 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 [2021-06-05 07:04:23,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:04:23,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:23,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:23,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:23,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:23,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411148177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:23,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:23,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 07:04:23,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865941104] [2021-06-05 07:04:23,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:04:23,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:23,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:04:23,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:04:23,965 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) [2021-06-05 07:04:24,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:24,126 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-06-05 07:04:24,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 07:04:24,127 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 [2021-06-05 07:04:24,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:24,130 INFO L225 Difference]: With dead ends: 710 [2021-06-05 07:04:24,130 INFO L226 Difference]: Without dead ends: 672 [2021-06-05 07:04:24,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 134.4ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:04:24,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-05 07:04:24,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-06-05 07:04:24,142 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) [2021-06-05 07:04:24,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-06-05 07:04:24,144 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-06-05 07:04:24,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:24,144 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-06-05 07:04:24,144 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) [2021-06-05 07:04:24,144 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-06-05 07:04:24,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:04:24,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:24,145 INFO L521 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] [2021-06-05 07:04:24,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 07:04:24,368 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:24,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:24,368 INFO L82 PathProgramCache]: Analyzing trace with hash 2064876612, now seen corresponding path program 2 times [2021-06-05 07:04:24,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:24,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584388717] [2021-06-05 07:04:24,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:24,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:24,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:04:24,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:24,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584388717] [2021-06-05 07:04:24,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584388717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:24,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402773617] [2021-06-05 07:04:24,395 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 [2021-06-05 07:04:24,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:04:24,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:24,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 07:04:24,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:24,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:04:24,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402773617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:24,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:24,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 07:04:24,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866087416] [2021-06-05 07:04:24,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:04:24,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:24,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:04:24,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:04:24,486 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) [2021-06-05 07:04:24,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:24,616 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-06-05 07:04:24,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 07:04:24,617 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 [2021-06-05 07:04:24,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:24,622 INFO L225 Difference]: With dead ends: 830 [2021-06-05 07:04:24,622 INFO L226 Difference]: Without dead ends: 830 [2021-06-05 07:04:24,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:04:24,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-06-05 07:04:24,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-06-05 07:04:24,643 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) [2021-06-05 07:04:24,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-06-05 07:04:24,645 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-06-05 07:04:24,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:24,645 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-06-05 07:04:24,645 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) [2021-06-05 07:04:24,645 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-06-05 07:04:24,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:04:24,646 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:24,646 INFO L521 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] [2021-06-05 07:04:24,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 07:04:24,869 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:24,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:24,869 INFO L82 PathProgramCache]: Analyzing trace with hash 718195046, now seen corresponding path program 9 times [2021-06-05 07:04:24,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:24,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310461607] [2021-06-05 07:04:24,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:24,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:24,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:24,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:24,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310461607] [2021-06-05 07:04:24,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310461607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:24,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260492046] [2021-06-05 07:04:24,929 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 [2021-06-05 07:04:24,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:04:24,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:24,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:24,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:25,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:25,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260492046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:25,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:25,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 07:04:25,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882533783] [2021-06-05 07:04:25,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:04:25,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:25,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:04:25,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:04:25,072 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) [2021-06-05 07:04:25,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:25,397 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-06-05 07:04:25,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 07:04:25,397 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 [2021-06-05 07:04:25,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:25,402 INFO L225 Difference]: With dead ends: 1196 [2021-06-05 07:04:25,403 INFO L226 Difference]: Without dead ends: 1196 [2021-06-05 07:04:25,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 194.1ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:04:25,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-05 07:04:25,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-06-05 07:04:25,421 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) [2021-06-05 07:04:25,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-06-05 07:04:25,423 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-06-05 07:04:25,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:25,423 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-06-05 07:04:25,423 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) [2021-06-05 07:04:25,423 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-06-05 07:04:25,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:04:25,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:25,425 INFO L521 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] [2021-06-05 07:04:25,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 07:04:25,641 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:25,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:25,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1503109140, now seen corresponding path program 10 times [2021-06-05 07:04:25,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:25,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634320778] [2021-06-05 07:04:25,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:25,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:25,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:25,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:25,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634320778] [2021-06-05 07:04:25,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634320778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:25,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888867222] [2021-06-05 07:04:25,682 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 [2021-06-05 07:04:25,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:04:25,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:25,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:25,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:25,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:25,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888867222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:25,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:25,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 07:04:25,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79565344] [2021-06-05 07:04:25,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:04:25,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:25,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:04:25,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:04:25,793 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) [2021-06-05 07:04:26,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:26,225 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-06-05 07:04:26,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:04:26,225 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 [2021-06-05 07:04:26,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:26,231 INFO L225 Difference]: With dead ends: 1492 [2021-06-05 07:04:26,231 INFO L226 Difference]: Without dead ends: 1492 [2021-06-05 07:04:26,232 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 273.3ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:04:26,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-06-05 07:04:26,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-06-05 07:04:26,252 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) [2021-06-05 07:04:26,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-06-05 07:04:26,254 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-06-05 07:04:26,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:26,254 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-06-05 07:04:26,254 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) [2021-06-05 07:04:26,254 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-06-05 07:04:26,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:04:26,256 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:26,256 INFO L521 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] [2021-06-05 07:04:26,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 07:04:26,469 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:26,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:26,469 INFO L82 PathProgramCache]: Analyzing trace with hash 420086484, now seen corresponding path program 11 times [2021-06-05 07:04:26,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:26,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602203749] [2021-06-05 07:04:26,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:26,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:26,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:26,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:26,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602203749] [2021-06-05 07:04:26,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602203749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:26,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450799489] [2021-06-05 07:04:26,519 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 [2021-06-05 07:04:26,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:04:26,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:26,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:26,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:26,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:26,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450799489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:26,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:26,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 07:04:26,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194881380] [2021-06-05 07:04:26,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:04:26,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:26,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:04:26,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:04:26,661 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) [2021-06-05 07:04:26,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:26,896 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-06-05 07:04:26,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:04:26,896 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 [2021-06-05 07:04:26,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:26,901 INFO L225 Difference]: With dead ends: 1258 [2021-06-05 07:04:26,901 INFO L226 Difference]: Without dead ends: 1248 [2021-06-05 07:04:26,901 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 171.5ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:04:26,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-05 07:04:26,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-06-05 07:04:26,921 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) [2021-06-05 07:04:26,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-06-05 07:04:26,923 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-06-05 07:04:26,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:26,923 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-06-05 07:04:26,923 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) [2021-06-05 07:04:26,923 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-06-05 07:04:26,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:04:26,925 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:26,925 INFO L521 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] [2021-06-05 07:04:27,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:27,147 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:27,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:27,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1891164602, now seen corresponding path program 12 times [2021-06-05 07:04:27,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:27,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815959672] [2021-06-05 07:04:27,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:27,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:27,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:27,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:27,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815959672] [2021-06-05 07:04:27,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815959672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:27,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379428664] [2021-06-05 07:04:27,200 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 [2021-06-05 07:04:27,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:04:27,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:27,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:27,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:27,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:27,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379428664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:27,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:27,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 07:04:27,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719524748] [2021-06-05 07:04:27,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:04:27,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:27,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:04:27,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:04:27,312 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) [2021-06-05 07:04:27,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:27,570 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-06-05 07:04:27,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 07:04:27,571 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 [2021-06-05 07:04:27,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:27,575 INFO L225 Difference]: With dead ends: 1329 [2021-06-05 07:04:27,575 INFO L226 Difference]: Without dead ends: 1329 [2021-06-05 07:04:27,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 177.3ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:04:27,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-06-05 07:04:27,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-06-05 07:04:27,596 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) [2021-06-05 07:04:27,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-06-05 07:04:27,598 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-06-05 07:04:27,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:27,598 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-06-05 07:04:27,598 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) [2021-06-05 07:04:27,598 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-06-05 07:04:27,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:04:27,600 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:27,600 INFO L521 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] [2021-06-05 07:04:27,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:27,822 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:27,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:27,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1458287998, now seen corresponding path program 13 times [2021-06-05 07:04:27,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:27,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077811224] [2021-06-05 07:04:27,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:27,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:27,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:27,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:27,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077811224] [2021-06-05 07:04:27,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077811224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:27,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068590558] [2021-06-05 07:04:27,865 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 [2021-06-05 07:04:27,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:27,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:27,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:27,962 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:27,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068590558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:27,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:27,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 07:04:27,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040668015] [2021-06-05 07:04:27,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:04:27,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:27,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:04:27,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:04:27,964 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) [2021-06-05 07:04:28,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:28,347 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-06-05 07:04:28,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:04:28,347 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 [2021-06-05 07:04:28,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:28,352 INFO L225 Difference]: With dead ends: 1548 [2021-06-05 07:04:28,352 INFO L226 Difference]: Without dead ends: 1544 [2021-06-05 07:04:28,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 214.4ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:04:28,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-06-05 07:04:28,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-06-05 07:04:28,374 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) [2021-06-05 07:04:28,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-06-05 07:04:28,377 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-06-05 07:04:28,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:28,377 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-06-05 07:04:28,377 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) [2021-06-05 07:04:28,377 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-06-05 07:04:28,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:04:28,379 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:28,379 INFO L521 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] [2021-06-05 07:04:28,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 07:04:28,594 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:28,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:28,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1186278808, now seen corresponding path program 14 times [2021-06-05 07:04:28,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:28,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320032932] [2021-06-05 07:04:28,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:28,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:28,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:28,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:28,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320032932] [2021-06-05 07:04:28,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320032932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:28,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019130506] [2021-06-05 07:04:28,639 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 [2021-06-05 07:04:28,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:04:28,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:28,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:28,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:28,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:28,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019130506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:28,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:28,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 07:04:28,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330614219] [2021-06-05 07:04:28,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:04:28,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:28,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:04:28,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:04:28,778 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) [2021-06-05 07:04:29,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:29,532 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-06-05 07:04:29,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 07:04:29,533 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 [2021-06-05 07:04:29,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:29,544 INFO L225 Difference]: With dead ends: 2734 [2021-06-05 07:04:29,544 INFO L226 Difference]: Without dead ends: 2734 [2021-06-05 07:04:29,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 436.0ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:04:29,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-06-05 07:04:29,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-06-05 07:04:29,574 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) [2021-06-05 07:04:29,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-06-05 07:04:29,577 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-06-05 07:04:29,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:29,577 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-06-05 07:04:29,577 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) [2021-06-05 07:04:29,577 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-06-05 07:04:29,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:04:29,579 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:29,579 INFO L521 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] [2021-06-05 07:04:29,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:29,793 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:29,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:29,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1753230888, now seen corresponding path program 15 times [2021-06-05 07:04:29,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:29,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380180137] [2021-06-05 07:04:29,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:29,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:29,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:29,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:29,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380180137] [2021-06-05 07:04:29,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380180137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:29,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490792047] [2021-06-05 07:04:29,831 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 [2021-06-05 07:04:29,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:04:29,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:29,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:29,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:29,967 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:29,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490792047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:29,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:29,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 07:04:29,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469221419] [2021-06-05 07:04:29,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:04:29,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:29,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:04:29,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:04:29,969 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) [2021-06-05 07:04:30,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:30,661 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-06-05 07:04:30,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 07:04:30,661 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 [2021-06-05 07:04:30,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:30,668 INFO L225 Difference]: With dead ends: 2693 [2021-06-05 07:04:30,668 INFO L226 Difference]: Without dead ends: 2693 [2021-06-05 07:04:30,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 434.6ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:04:30,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-06-05 07:04:30,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-06-05 07:04:30,700 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) [2021-06-05 07:04:30,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-06-05 07:04:30,719 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-06-05 07:04:30,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:30,719 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-06-05 07:04:30,719 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) [2021-06-05 07:04:30,720 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-06-05 07:04:30,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:04:30,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:30,722 INFO L521 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] [2021-06-05 07:04:30,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 07:04:30,929 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:30,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:30,929 INFO L82 PathProgramCache]: Analyzing trace with hash 580885030, now seen corresponding path program 16 times [2021-06-05 07:04:30,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:30,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753632345] [2021-06-05 07:04:30,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:30,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:30,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:30,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:30,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753632345] [2021-06-05 07:04:30,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753632345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:30,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121286934] [2021-06-05 07:04:30,974 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 [2021-06-05 07:04:30,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:04:30,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:30,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:31,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:31,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:31,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121286934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:31,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:31,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 07:04:31,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198665778] [2021-06-05 07:04:31,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:04:31,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:31,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:04:31,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:04:31,088 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) [2021-06-05 07:04:31,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:31,690 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-06-05 07:04:31,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 07:04:31,690 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 [2021-06-05 07:04:31,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:31,696 INFO L225 Difference]: With dead ends: 2677 [2021-06-05 07:04:31,696 INFO L226 Difference]: Without dead ends: 2677 [2021-06-05 07:04:31,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 361.1ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:04:31,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-06-05 07:04:31,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-06-05 07:04:31,729 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) [2021-06-05 07:04:31,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-06-05 07:04:31,731 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-06-05 07:04:31,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:31,731 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-06-05 07:04:31,731 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) [2021-06-05 07:04:31,731 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-06-05 07:04:31,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:04:31,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:31,733 INFO L521 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] [2021-06-05 07:04:31,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 07:04:31,949 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:31,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:31,949 INFO L82 PathProgramCache]: Analyzing trace with hash 662261118, now seen corresponding path program 17 times [2021-06-05 07:04:31,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:31,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717970506] [2021-06-05 07:04:31,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:31,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:31,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:31,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:31,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717970506] [2021-06-05 07:04:31,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717970506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:31,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278085323] [2021-06-05 07:04:31,989 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 [2021-06-05 07:04:32,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:04:32,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:32,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:32,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:32,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:32,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278085323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:32,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:32,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 07:04:32,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122073146] [2021-06-05 07:04:32,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:04:32,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:32,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:04:32,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:04:32,087 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) [2021-06-05 07:04:32,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:32,649 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-06-05 07:04:32,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 07:04:32,649 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 [2021-06-05 07:04:32,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:32,654 INFO L225 Difference]: With dead ends: 2474 [2021-06-05 07:04:32,655 INFO L226 Difference]: Without dead ends: 2470 [2021-06-05 07:04:32,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 340.1ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 07:04:32,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-06-05 07:04:32,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-06-05 07:04:32,681 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) [2021-06-05 07:04:32,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-06-05 07:04:32,684 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-06-05 07:04:32,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:32,684 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-06-05 07:04:32,684 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) [2021-06-05 07:04:32,684 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-06-05 07:04:32,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:04:32,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:32,686 INFO L521 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] [2021-06-05 07:04:32,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 07:04:32,901 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:32,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:32,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1592918334, now seen corresponding path program 18 times [2021-06-05 07:04:32,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:32,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551895392] [2021-06-05 07:04:32,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:32,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:32,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:32,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:32,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551895392] [2021-06-05 07:04:32,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551895392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:32,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409531801] [2021-06-05 07:04:32,951 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 [2021-06-05 07:04:32,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:04:32,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:32,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:32,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:33,093 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:33,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409531801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:33,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:33,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 07:04:33,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28007665] [2021-06-05 07:04:33,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:04:33,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:33,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:04:33,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:04:33,095 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) [2021-06-05 07:04:33,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:33,741 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-06-05 07:04:33,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 07:04:33,749 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 [2021-06-05 07:04:33,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:33,754 INFO L225 Difference]: With dead ends: 2514 [2021-06-05 07:04:33,754 INFO L226 Difference]: Without dead ends: 2514 [2021-06-05 07:04:33,755 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 389.6ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:04:33,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-06-05 07:04:33,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-06-05 07:04:33,783 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) [2021-06-05 07:04:33,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-06-05 07:04:33,785 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-06-05 07:04:33,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:33,786 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-06-05 07:04:33,786 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) [2021-06-05 07:04:33,786 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-06-05 07:04:33,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:04:33,788 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:33,788 INFO L521 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] [2021-06-05 07:04:34,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 07:04:34,005 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:34,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:34,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1059009808, now seen corresponding path program 19 times [2021-06-05 07:04:34,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:34,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077259467] [2021-06-05 07:04:34,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:34,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:34,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:34,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:34,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077259467] [2021-06-05 07:04:34,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077259467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:34,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650269970] [2021-06-05 07:04:34,045 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 [2021-06-05 07:04:34,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:34,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:34,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:34,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:34,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650269970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:34,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:34,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 07:04:34,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173081365] [2021-06-05 07:04:34,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:04:34,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:34,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:04:34,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:04:34,160 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) [2021-06-05 07:04:34,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:34,717 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-06-05 07:04:34,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 07:04:34,718 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 [2021-06-05 07:04:34,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:34,723 INFO L225 Difference]: With dead ends: 2332 [2021-06-05 07:04:34,723 INFO L226 Difference]: Without dead ends: 2328 [2021-06-05 07:04:34,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 335.4ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 07:04:34,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-05 07:04:34,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-06-05 07:04:34,749 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) [2021-06-05 07:04:34,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-06-05 07:04:34,752 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-06-05 07:04:34,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:34,752 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-06-05 07:04:34,752 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) [2021-06-05 07:04:34,752 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-06-05 07:04:34,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:04:34,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:34,754 INFO L521 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] [2021-06-05 07:04:34,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 07:04:34,969 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:34,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:34,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1971295360, now seen corresponding path program 3 times [2021-06-05 07:04:34,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:34,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285021559] [2021-06-05 07:04:34,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:34,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:34,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:04:34,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:34,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285021559] [2021-06-05 07:04:34,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285021559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:34,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99216752] [2021-06-05 07:04:34,997 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 [2021-06-05 07:04:35,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 07:04:35,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:35,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 07:04:35,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:35,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:04:35,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99216752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:35,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:35,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 07:04:35,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889728540] [2021-06-05 07:04:35,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:04:35,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:35,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:04:35,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:04:35,079 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) [2021-06-05 07:04:35,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:35,149 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-06-05 07:04:35,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:04:35,149 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 [2021-06-05 07:04:35,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:35,151 INFO L225 Difference]: With dead ends: 929 [2021-06-05 07:04:35,151 INFO L226 Difference]: Without dead ends: 929 [2021-06-05 07:04:35,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 52.6ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:04:35,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-06-05 07:04:35,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-06-05 07:04:35,164 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) [2021-06-05 07:04:35,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-06-05 07:04:35,167 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-06-05 07:04:35,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:35,167 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-06-05 07:04:35,167 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) [2021-06-05 07:04:35,167 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-06-05 07:04:35,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:04:35,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:35,169 INFO L521 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] [2021-06-05 07:04:35,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:35,389 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:35,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:35,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1041095616, now seen corresponding path program 20 times [2021-06-05 07:04:35,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:35,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83844493] [2021-06-05 07:04:35,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:35,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:35,429 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:35,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:35,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83844493] [2021-06-05 07:04:35,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83844493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:35,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971511951] [2021-06-05 07:04:35,430 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 [2021-06-05 07:04:35,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:04:35,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:35,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:35,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:35,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:35,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971511951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:35,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:35,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 07:04:35,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357618447] [2021-06-05 07:04:35,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:04:35,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:35,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:04:35,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:04:35,533 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) [2021-06-05 07:04:35,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:35,795 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-06-05 07:04:35,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:04:35,796 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 [2021-06-05 07:04:35,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:35,800 INFO L225 Difference]: With dead ends: 1555 [2021-06-05 07:04:35,800 INFO L226 Difference]: Without dead ends: 1555 [2021-06-05 07:04:35,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 159.0ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:04:35,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-06-05 07:04:35,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-06-05 07:04:35,819 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) [2021-06-05 07:04:35,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-06-05 07:04:35,821 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-06-05 07:04:35,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:35,822 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-06-05 07:04:35,822 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) [2021-06-05 07:04:35,822 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-06-05 07:04:35,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:04:35,823 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:35,824 INFO L521 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] [2021-06-05 07:04:36,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 07:04:36,037 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:36,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:36,037 INFO L82 PathProgramCache]: Analyzing trace with hash 861583836, now seen corresponding path program 21 times [2021-06-05 07:04:36,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:36,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172452218] [2021-06-05 07:04:36,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:36,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:36,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:36,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:36,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172452218] [2021-06-05 07:04:36,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172452218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:36,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280672044] [2021-06-05 07:04:36,069 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 [2021-06-05 07:04:36,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:04:36,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:36,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:36,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:36,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:36,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280672044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:36,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:36,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 07:04:36,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280554120] [2021-06-05 07:04:36,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:04:36,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:36,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:04:36,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:04:36,168 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) [2021-06-05 07:04:36,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:36,396 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-06-05 07:04:36,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:04:36,396 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 [2021-06-05 07:04:36,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:36,401 INFO L225 Difference]: With dead ends: 1605 [2021-06-05 07:04:36,402 INFO L226 Difference]: Without dead ends: 1605 [2021-06-05 07:04:36,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 134.8ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:04:36,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-06-05 07:04:36,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-06-05 07:04:36,419 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) [2021-06-05 07:04:36,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-06-05 07:04:36,422 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-06-05 07:04:36,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:36,422 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-06-05 07:04:36,422 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) [2021-06-05 07:04:36,422 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-06-05 07:04:36,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:04:36,424 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:36,424 INFO L521 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] [2021-06-05 07:04:36,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:36,646 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:36,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:36,647 INFO L82 PathProgramCache]: Analyzing trace with hash 816762694, now seen corresponding path program 22 times [2021-06-05 07:04:36,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:36,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411472339] [2021-06-05 07:04:36,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:36,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:36,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:04:36,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:36,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411472339] [2021-06-05 07:04:36,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411472339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:36,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212646817] [2021-06-05 07:04:36,674 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 [2021-06-05 07:04:36,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:04:36,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:36,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:36,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:36,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:04:36,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212646817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:36,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:36,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 07:04:36,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706371571] [2021-06-05 07:04:36,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:04:36,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:36,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:04:36,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:04:36,758 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) [2021-06-05 07:04:36,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:36,939 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-06-05 07:04:36,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 07:04:36,940 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 [2021-06-05 07:04:36,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:36,941 INFO L225 Difference]: With dead ends: 1524 [2021-06-05 07:04:36,942 INFO L226 Difference]: Without dead ends: 1520 [2021-06-05 07:04:36,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 102.4ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:04:36,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-06-05 07:04:36,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-06-05 07:04:36,961 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) [2021-06-05 07:04:36,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-06-05 07:04:36,964 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-06-05 07:04:36,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:36,964 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-06-05 07:04:36,964 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) [2021-06-05 07:04:36,964 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-06-05 07:04:36,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:04:36,966 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:36,966 INFO L521 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] [2021-06-05 07:04:37,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 07:04:37,181 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:37,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:37,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1414099352, now seen corresponding path program 23 times [2021-06-05 07:04:37,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:37,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707223336] [2021-06-05 07:04:37,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:37,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:37,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:37,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:37,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707223336] [2021-06-05 07:04:37,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707223336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:37,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625026009] [2021-06-05 07:04:37,218 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 [2021-06-05 07:04:37,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:04:37,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:37,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:37,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:37,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:37,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625026009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:37,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:37,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 07:04:37,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660253675] [2021-06-05 07:04:37,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:04:37,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:37,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:04:37,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:04:37,311 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) [2021-06-05 07:04:37,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:37,521 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-06-05 07:04:37,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:04:37,521 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 [2021-06-05 07:04:37,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:37,524 INFO L225 Difference]: With dead ends: 1508 [2021-06-05 07:04:37,524 INFO L226 Difference]: Without dead ends: 1496 [2021-06-05 07:04:37,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 121.5ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:04:37,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-06-05 07:04:37,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-06-05 07:04:37,537 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) [2021-06-05 07:04:37,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-06-05 07:04:37,540 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-06-05 07:04:37,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:37,540 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-06-05 07:04:37,540 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) [2021-06-05 07:04:37,540 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-06-05 07:04:37,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:04:37,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:37,542 INFO L521 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] [2021-06-05 07:04:37,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:37,764 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:37,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:37,765 INFO L82 PathProgramCache]: Analyzing trace with hash 887679068, now seen corresponding path program 24 times [2021-06-05 07:04:37,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:37,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258943256] [2021-06-05 07:04:37,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:37,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:37,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:37,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:37,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258943256] [2021-06-05 07:04:37,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258943256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:37,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842892864] [2021-06-05 07:04:37,799 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 [2021-06-05 07:04:37,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:04:37,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:37,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:37,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:37,907 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:37,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842892864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:37,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:37,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 07:04:37,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671286923] [2021-06-05 07:04:37,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:04:37,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:37,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:04:37,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:04:37,909 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) [2021-06-05 07:04:38,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:38,385 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-06-05 07:04:38,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 07:04:38,385 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 [2021-06-05 07:04:38,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:38,389 INFO L225 Difference]: With dead ends: 2412 [2021-06-05 07:04:38,389 INFO L226 Difference]: Without dead ends: 2412 [2021-06-05 07:04:38,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 318.6ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:04:38,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-06-05 07:04:38,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-06-05 07:04:38,411 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) [2021-06-05 07:04:38,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-06-05 07:04:38,414 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-06-05 07:04:38,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:38,414 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-06-05 07:04:38,414 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) [2021-06-05 07:04:38,414 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-06-05 07:04:38,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:04:38,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:38,416 INFO L521 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] [2021-06-05 07:04:38,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 07:04:38,639 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:38,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:38,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1454631148, now seen corresponding path program 25 times [2021-06-05 07:04:38,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:38,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87622139] [2021-06-05 07:04:38,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:38,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:38,676 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:38,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:38,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87622139] [2021-06-05 07:04:38,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87622139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:38,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786403320] [2021-06-05 07:04:38,677 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 [2021-06-05 07:04:38,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:38,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:38,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:38,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:38,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786403320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:38,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:38,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 07:04:38,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359891104] [2021-06-05 07:04:38,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:04:38,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:38,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:04:38,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:04:38,788 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) [2021-06-05 07:04:39,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:39,267 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-06-05 07:04:39,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 07:04:39,268 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 [2021-06-05 07:04:39,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:39,270 INFO L225 Difference]: With dead ends: 2335 [2021-06-05 07:04:39,270 INFO L226 Difference]: Without dead ends: 2335 [2021-06-05 07:04:39,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 326.7ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:04:39,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-06-05 07:04:39,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-06-05 07:04:39,287 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) [2021-06-05 07:04:39,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 07:04:39,289 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 07:04:39,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:39,289 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 07:04:39,289 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) [2021-06-05 07:04:39,289 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 07:04:39,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:04:39,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:39,291 INFO L521 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] [2021-06-05 07:04:39,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:39,501 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:39,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:39,501 INFO L82 PathProgramCache]: Analyzing trace with hash 282285290, now seen corresponding path program 26 times [2021-06-05 07:04:39,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:39,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718642345] [2021-06-05 07:04:39,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:39,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:39,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:39,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:39,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718642345] [2021-06-05 07:04:39,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718642345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:39,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887619534] [2021-06-05 07:04:39,553 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 [2021-06-05 07:04:39,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:04:39,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:39,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:39,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:39,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:39,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887619534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:39,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:39,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 07:04:39,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079819491] [2021-06-05 07:04:39,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:04:39,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:39,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:04:39,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:04:39,683 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) [2021-06-05 07:04:40,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:40,075 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-06-05 07:04:40,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:04:40,076 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 [2021-06-05 07:04:40,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:40,079 INFO L225 Difference]: With dead ends: 2285 [2021-06-05 07:04:40,079 INFO L226 Difference]: Without dead ends: 2285 [2021-06-05 07:04:40,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 257.8ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:04:40,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-06-05 07:04:40,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-06-05 07:04:40,095 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) [2021-06-05 07:04:40,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-05 07:04:40,098 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-05 07:04:40,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:40,098 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-05 07:04:40,098 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) [2021-06-05 07:04:40,098 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-05 07:04:40,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:04:40,100 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:40,100 INFO L521 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] [2021-06-05 07:04:40,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 07:04:40,316 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:40,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:40,317 INFO L82 PathProgramCache]: Analyzing trace with hash 363661378, now seen corresponding path program 27 times [2021-06-05 07:04:40,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:40,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444941830] [2021-06-05 07:04:40,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:40,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:40,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:40,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:40,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444941830] [2021-06-05 07:04:40,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444941830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:40,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727215281] [2021-06-05 07:04:40,351 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 [2021-06-05 07:04:40,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:04:40,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:40,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:40,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:40,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:40,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727215281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:40,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:40,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 07:04:40,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964858753] [2021-06-05 07:04:40,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:04:40,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:40,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:04:40,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:04:40,439 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) [2021-06-05 07:04:40,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:40,791 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-06-05 07:04:40,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:04:40,791 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 [2021-06-05 07:04:40,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:40,794 INFO L225 Difference]: With dead ends: 2176 [2021-06-05 07:04:40,794 INFO L226 Difference]: Without dead ends: 2172 [2021-06-05 07:04:40,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 225.4ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:04:40,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-06-05 07:04:40,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-06-05 07:04:40,809 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) [2021-06-05 07:04:40,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 07:04:40,811 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 07:04:40,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:40,811 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 07:04:40,811 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) [2021-06-05 07:04:40,811 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 07:04:40,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:04:40,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:40,812 INFO L521 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] [2021-06-05 07:04:41,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:41,013 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:41,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:41,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1294318594, now seen corresponding path program 28 times [2021-06-05 07:04:41,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:41,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995592161] [2021-06-05 07:04:41,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:41,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:41,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:41,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:41,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995592161] [2021-06-05 07:04:41,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995592161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:41,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470989858] [2021-06-05 07:04:41,058 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 [2021-06-05 07:04:41,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:04:41,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:41,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:41,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:41,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:41,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470989858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:41,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:41,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 07:04:41,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601386995] [2021-06-05 07:04:41,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:04:41,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:41,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:04:41,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:04:41,188 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) [2021-06-05 07:04:41,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:41,555 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-06-05 07:04:41,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:04:41,556 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 [2021-06-05 07:04:41,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:41,559 INFO L225 Difference]: With dead ends: 2199 [2021-06-05 07:04:41,559 INFO L226 Difference]: Without dead ends: 2199 [2021-06-05 07:04:41,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 244.9ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:04:41,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-06-05 07:04:41,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-06-05 07:04:41,576 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) [2021-06-05 07:04:41,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-05 07:04:41,578 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-05 07:04:41,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:41,578 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-05 07:04:41,578 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) [2021-06-05 07:04:41,578 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-05 07:04:41,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:04:41,579 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:41,579 INFO L521 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] [2021-06-05 07:04:41,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 07:04:41,780 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:41,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:41,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1357609548, now seen corresponding path program 29 times [2021-06-05 07:04:41,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:41,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718171512] [2021-06-05 07:04:41,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:41,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:41,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:41,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:41,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718171512] [2021-06-05 07:04:41,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718171512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:41,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701651196] [2021-06-05 07:04:41,816 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 [2021-06-05 07:04:41,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:04:41,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:41,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:41,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:41,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:41,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701651196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:41,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:41,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 07:04:41,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229918479] [2021-06-05 07:04:41,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:04:41,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:41,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:04:41,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:04:41,934 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) [2021-06-05 07:04:42,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:42,326 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-06-05 07:04:42,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:04:42,326 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 [2021-06-05 07:04:42,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:42,329 INFO L225 Difference]: With dead ends: 2156 [2021-06-05 07:04:42,329 INFO L226 Difference]: Without dead ends: 2152 [2021-06-05 07:04:42,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 250.0ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-06-05 07:04:42,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-06-05 07:04:42,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-06-05 07:04:42,352 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) [2021-06-05 07:04:42,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 07:04:42,354 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 07:04:42,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:42,354 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 07:04:42,354 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) [2021-06-05 07:04:42,354 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 07:04:42,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:04:42,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:42,356 INFO L521 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] [2021-06-05 07:04:42,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 07:04:42,577 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:42,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:42,578 INFO L82 PathProgramCache]: Analyzing trace with hash -354181564, now seen corresponding path program 30 times [2021-06-05 07:04:42,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:42,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913021895] [2021-06-05 07:04:42,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:42,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:42,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:42,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:42,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913021895] [2021-06-05 07:04:42,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913021895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:42,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220945778] [2021-06-05 07:04:42,616 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 [2021-06-05 07:04:42,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:04:42,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:42,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:42,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:42,720 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:42,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220945778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:42,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:42,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 07:04:42,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573344938] [2021-06-05 07:04:42,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:04:42,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:42,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:04:42,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:04:42,722 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) [2021-06-05 07:04:43,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:43,049 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-06-05 07:04:43,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:04:43,050 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 [2021-06-05 07:04:43,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:43,052 INFO L225 Difference]: With dead ends: 2097 [2021-06-05 07:04:43,052 INFO L226 Difference]: Without dead ends: 2097 [2021-06-05 07:04:43,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 209.0ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:04:43,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-06-05 07:04:43,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-06-05 07:04:43,068 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) [2021-06-05 07:04:43,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-06-05 07:04:43,070 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-06-05 07:04:43,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:43,070 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-06-05 07:04:43,070 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) [2021-06-05 07:04:43,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-06-05 07:04:43,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:04:43,072 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:43,072 INFO L521 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] [2021-06-05 07:04:43,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 07:04:43,272 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:43,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:43,273 INFO L82 PathProgramCache]: Analyzing trace with hash -272805476, now seen corresponding path program 31 times [2021-06-05 07:04:43,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:43,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025868001] [2021-06-05 07:04:43,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:43,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:43,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:43,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:43,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025868001] [2021-06-05 07:04:43,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025868001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:43,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229850542] [2021-06-05 07:04:43,308 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 [2021-06-05 07:04:43,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:43,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:43,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:43,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:43,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229850542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:43,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:43,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 07:04:43,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616366854] [2021-06-05 07:04:43,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:04:43,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:43,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:04:43,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:04:43,412 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) [2021-06-05 07:04:43,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:43,697 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-06-05 07:04:43,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:04:43,697 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 [2021-06-05 07:04:43,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:43,699 INFO L225 Difference]: With dead ends: 1963 [2021-06-05 07:04:43,699 INFO L226 Difference]: Without dead ends: 1959 [2021-06-05 07:04:43,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 163.9ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:04:43,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-06-05 07:04:43,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-06-05 07:04:43,718 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) [2021-06-05 07:04:43,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-06-05 07:04:43,721 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-06-05 07:04:43,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:43,721 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-06-05 07:04:43,721 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) [2021-06-05 07:04:43,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-06-05 07:04:43,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:04:43,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:43,723 INFO L521 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] [2021-06-05 07:04:43,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 07:04:43,945 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:43,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:43,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1787897448, now seen corresponding path program 32 times [2021-06-05 07:04:43,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:43,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117783599] [2021-06-05 07:04:43,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:43,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:43,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:43,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:43,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117783599] [2021-06-05 07:04:43,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117783599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:43,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311678733] [2021-06-05 07:04:43,979 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 [2021-06-05 07:04:44,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:04:44,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:44,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:44,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:44,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:44,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311678733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:44,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:44,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 07:04:44,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989637692] [2021-06-05 07:04:44,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:04:44,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:44,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:04:44,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:04:44,075 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) [2021-06-05 07:04:44,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:44,273 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-06-05 07:04:44,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:04:44,273 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 [2021-06-05 07:04:44,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:44,275 INFO L225 Difference]: With dead ends: 1728 [2021-06-05 07:04:44,275 INFO L226 Difference]: Without dead ends: 1716 [2021-06-05 07:04:44,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 120.5ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:04:44,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-06-05 07:04:44,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-06-05 07:04:44,288 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) [2021-06-05 07:04:44,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-06-05 07:04:44,289 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-06-05 07:04:44,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:44,290 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-06-05 07:04:44,290 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) [2021-06-05 07:04:44,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-06-05 07:04:44,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:04:44,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:44,291 INFO L521 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] [2021-06-05 07:04:44,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:44,493 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:44,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:44,493 INFO L82 PathProgramCache]: Analyzing trace with hash -190770732, now seen corresponding path program 33 times [2021-06-05 07:04:44,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:44,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85717048] [2021-06-05 07:04:44,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:44,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:44,543 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:44,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:44,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85717048] [2021-06-05 07:04:44,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85717048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:44,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602674732] [2021-06-05 07:04:44,543 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 [2021-06-05 07:04:44,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:04:44,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:44,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:44,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:44,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602674732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:44,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:44,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 07:04:44,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195212755] [2021-06-05 07:04:44,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:04:44,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:44,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:04:44,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:04:44,670 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) [2021-06-05 07:04:45,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:45,011 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-06-05 07:04:45,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:04:45,011 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 [2021-06-05 07:04:45,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:45,013 INFO L225 Difference]: With dead ends: 1821 [2021-06-05 07:04:45,013 INFO L226 Difference]: Without dead ends: 1821 [2021-06-05 07:04:45,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 225.7ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-05 07:04:45,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-06-05 07:04:45,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-06-05 07:04:45,028 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) [2021-06-05 07:04:45,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-06-05 07:04:45,031 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-06-05 07:04:45,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:45,031 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-06-05 07:04:45,031 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) [2021-06-05 07:04:45,031 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-06-05 07:04:45,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:04:45,033 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:45,033 INFO L521 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] [2021-06-05 07:04:45,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-05 07:04:45,249 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:45,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:45,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1452268422, now seen corresponding path program 34 times [2021-06-05 07:04:45,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:45,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962011355] [2021-06-05 07:04:45,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:45,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:45,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:45,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:45,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962011355] [2021-06-05 07:04:45,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962011355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:45,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626253988] [2021-06-05 07:04:45,284 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 [2021-06-05 07:04:45,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:04:45,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:45,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:45,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:45,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:45,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626253988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:45,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:45,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 07:04:45,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043898791] [2021-06-05 07:04:45,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:04:45,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:45,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:04:45,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:04:45,392 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) [2021-06-05 07:04:45,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:45,708 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-06-05 07:04:45,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 07:04:45,708 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 [2021-06-05 07:04:45,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:45,711 INFO L225 Difference]: With dead ends: 1790 [2021-06-05 07:04:45,711 INFO L226 Difference]: Without dead ends: 1786 [2021-06-05 07:04:45,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 201.4ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:04:45,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-06-05 07:04:45,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-06-05 07:04:45,727 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) [2021-06-05 07:04:45,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-06-05 07:04:45,729 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-06-05 07:04:45,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:45,729 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-06-05 07:04:45,729 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) [2021-06-05 07:04:45,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-06-05 07:04:45,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:04:45,731 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:45,731 INFO L521 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] [2021-06-05 07:04:45,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 07:04:45,931 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:45,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:45,932 INFO L82 PathProgramCache]: Analyzing trace with hash 184811244, now seen corresponding path program 35 times [2021-06-05 07:04:45,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:45,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801534891] [2021-06-05 07:04:45,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:45,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:45,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:45,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:45,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801534891] [2021-06-05 07:04:45,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801534891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:45,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744450189] [2021-06-05 07:04:45,970 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 [2021-06-05 07:04:46,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:04:46,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:46,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:04:46,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:46,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:46,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744450189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:46,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:46,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 07:04:46,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083216454] [2021-06-05 07:04:46,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:04:46,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:46,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:04:46,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:04:46,061 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) [2021-06-05 07:04:46,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:46,219 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-06-05 07:04:46,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:04:46,223 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 [2021-06-05 07:04:46,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:46,225 INFO L225 Difference]: With dead ends: 1649 [2021-06-05 07:04:46,225 INFO L226 Difference]: Without dead ends: 1637 [2021-06-05 07:04:46,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:04:46,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-06-05 07:04:46,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-06-05 07:04:46,238 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) [2021-06-05 07:04:46,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-06-05 07:04:46,241 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-06-05 07:04:46,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:46,241 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-06-05 07:04:46,241 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) [2021-06-05 07:04:46,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-06-05 07:04:46,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:04:46,243 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:46,243 INFO L521 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] [2021-06-05 07:04:46,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:46,457 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:46,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:46,457 INFO L82 PathProgramCache]: Analyzing trace with hash -998684486, now seen corresponding path program 4 times [2021-06-05 07:04:46,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:46,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062261329] [2021-06-05 07:04:46,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:46,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:46,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:46,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:46,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062261329] [2021-06-05 07:04:46,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062261329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:46,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200683536] [2021-06-05 07:04:46,745 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 [2021-06-05 07:04:46,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:04:46,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:46,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 07:04:46,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:46,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:04:46,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:04:46,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20 treesize of output 12 [2021-06-05 07:04:46,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:46,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:46,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:46,972 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 07:04:46,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:46,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200683536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:46,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:46,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 07:04:46,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817196017] [2021-06-05 07:04:46,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:04:46,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:46,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:04:46,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:04:46,991 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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) [2021-06-05 07:04:47,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:47,551 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-06-05 07:04:47,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:04:47,552 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 [2021-06-05 07:04:47,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:47,554 INFO L225 Difference]: With dead ends: 1517 [2021-06-05 07:04:47,554 INFO L226 Difference]: Without dead ends: 1502 [2021-06-05 07:04:47,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 642.6ms TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:04:47,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-06-05 07:04:47,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-06-05 07:04:47,571 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) [2021-06-05 07:04:47,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-06-05 07:04:47,574 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-06-05 07:04:47,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:47,574 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-06-05 07:04:47,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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) [2021-06-05 07:04:47,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-06-05 07:04:47,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:04:47,576 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:47,576 INFO L521 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] [2021-06-05 07:04:47,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 07:04:47,777 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:47,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:47,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1267884794, now seen corresponding path program 5 times [2021-06-05 07:04:47,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:47,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135997945] [2021-06-05 07:04:47,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:47,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:48,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:48,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:48,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135997945] [2021-06-05 07:04:48,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135997945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:48,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624337726] [2021-06-05 07:04:48,024 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 [2021-06-05 07:04:48,049 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:04:48,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:48,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 07:04:48,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:48,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:04:48,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:04:48,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20 treesize of output 12 [2021-06-05 07:04:48,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:48,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:48,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:48,250 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 07:04:48,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:48,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624337726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:48,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:48,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 07:04:48,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376862864] [2021-06-05 07:04:48,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:04:48,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:48,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:04:48,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:04:48,276 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-06-05 07:04:48,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:48,763 INFO L93 Difference]: Finished difference Result 1495 states and 4899 transitions. [2021-06-05 07:04:48,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:04:48,763 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 26 [2021-06-05 07:04:48,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:48,765 INFO L225 Difference]: With dead ends: 1495 [2021-06-05 07:04:48,765 INFO L226 Difference]: Without dead ends: 1480 [2021-06-05 07:04:48,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 570.5ms TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:04:48,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-06-05 07:04:48,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1150. [2021-06-05 07:04:48,778 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) [2021-06-05 07:04:48,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-06-05 07:04:48,780 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-06-05 07:04:48,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:48,781 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-06-05 07:04:48,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-06-05 07:04:48,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-06-05 07:04:48,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:04:48,783 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:48,783 INFO L521 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] [2021-06-05 07:04:49,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:49,005 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:49,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:49,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1435653194, now seen corresponding path program 36 times [2021-06-05 07:04:49,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:49,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097457437] [2021-06-05 07:04:49,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:49,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:49,397 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:49,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:49,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097457437] [2021-06-05 07:04:49,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097457437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:49,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715967545] [2021-06-05 07:04:49,398 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 [2021-06-05 07:04:49,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:04:49,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:49,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:04:49,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:49,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:04:49,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:04:49,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:04:49,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:04:49,600 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 21 treesize of output 11 [2021-06-05 07:04:49,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:49,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:49,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:49,607 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 07:04:49,622 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:49,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715967545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:49,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:49,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 07:04:49,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031732827] [2021-06-05 07:04:49,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:04:49,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:49,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:04:49,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:04:49,623 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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) [2021-06-05 07:04:51,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:51,763 INFO L93 Difference]: Finished difference Result 1658 states and 5345 transitions. [2021-06-05 07:04:51,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:04:51,764 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 [2021-06-05 07:04:51,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:51,767 INFO L225 Difference]: With dead ends: 1658 [2021-06-05 07:04:51,767 INFO L226 Difference]: Without dead ends: 1643 [2021-06-05 07:04:51,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 2017.9ms TimeCoverageRelationStatistics Valid=349, Invalid=1721, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:04:51,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2021-06-05 07:04:51,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1180. [2021-06-05 07:04:51,781 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) [2021-06-05 07:04:51,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-06-05 07:04:51,783 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-06-05 07:04:51,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:51,784 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-06-05 07:04:51,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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) [2021-06-05 07:04:51,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-06-05 07:04:51,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:04:51,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:51,786 INFO L521 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] [2021-06-05 07:04:51,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 07:04:51,986 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:51,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:51,987 INFO L82 PathProgramCache]: Analyzing trace with hash -630606018, now seen corresponding path program 6 times [2021-06-05 07:04:51,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:51,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206444250] [2021-06-05 07:04:51,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:51,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:52,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:52,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:52,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206444250] [2021-06-05 07:04:52,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206444250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:52,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304644062] [2021-06-05 07:04:52,216 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 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 [2021-06-05 07:04:52,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:04:52,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:52,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 07:04:52,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:52,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:04:52,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:04:52,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20 treesize of output 12 [2021-06-05 07:04:52,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:52,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:52,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:52,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 07:04:52,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:52,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304644062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:52,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:52,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 07:04:52,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936469806] [2021-06-05 07:04:52,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:04:52,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:52,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:04:52,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:04:52,452 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-06-05 07:04:53,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:53,425 INFO L93 Difference]: Finished difference Result 1641 states and 5247 transitions. [2021-06-05 07:04:53,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:04:53,425 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 26 [2021-06-05 07:04:53,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:53,427 INFO L225 Difference]: With dead ends: 1641 [2021-06-05 07:04:53,427 INFO L226 Difference]: Without dead ends: 1626 [2021-06-05 07:04:53,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 875.5ms TimeCoverageRelationStatistics Valid=192, Invalid=738, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:04:53,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1626 states. [2021-06-05 07:04:53,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1626 to 1189. [2021-06-05 07:04:53,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 3.3383838383838382) internal successors, (3966), 1188 states have internal predecessors, (3966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:53,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 3966 transitions. [2021-06-05 07:04:53,442 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 3966 transitions. Word has length 26 [2021-06-05 07:04:53,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:53,442 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 3966 transitions. [2021-06-05 07:04:53,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-06-05 07:04:53,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 3966 transitions. [2021-06-05 07:04:53,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:04:53,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:53,444 INFO L521 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] [2021-06-05 07:04:53,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:53,645 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:53,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:53,645 INFO L82 PathProgramCache]: Analyzing trace with hash 919775546, now seen corresponding path program 37 times [2021-06-05 07:04:53,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:53,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594216757] [2021-06-05 07:04:53,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:53,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:53,950 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:53,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:53,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594216757] [2021-06-05 07:04:53,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594216757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:53,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272379354] [2021-06-05 07:04:53,951 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 [2021-06-05 07:04:53,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:53,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:04:53,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:54,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:04:54,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:04:54,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:04:54,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:04:54,145 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 21 treesize of output 11 [2021-06-05 07:04:54,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:54,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:54,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:54,153 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 07:04:54,172 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:54,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272379354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:54,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:54,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 07:04:54,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176120508] [2021-06-05 07:04:54,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:04:54,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:54,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:04:54,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:04:54,174 INFO L87 Difference]: Start difference. First operand 1189 states and 3966 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) 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) [2021-06-05 07:04:56,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:56,237 INFO L93 Difference]: Finished difference Result 1880 states and 5988 transitions. [2021-06-05 07:04:56,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 07:04:56,237 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) 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 26 [2021-06-05 07:04:56,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:56,241 INFO L225 Difference]: With dead ends: 1880 [2021-06-05 07:04:56,241 INFO L226 Difference]: Without dead ends: 1865 [2021-06-05 07:04:56,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1988.8ms TimeCoverageRelationStatistics Valid=423, Invalid=1833, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:04:56,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1865 states. [2021-06-05 07:04:56,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1865 to 1201. [2021-06-05 07:04:56,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1200 states have (on average 3.3466666666666667) internal successors, (4016), 1200 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:56,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 4016 transitions. [2021-06-05 07:04:56,257 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 4016 transitions. Word has length 26 [2021-06-05 07:04:56,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:56,257 INFO L482 AbstractCegarLoop]: Abstraction has 1201 states and 4016 transitions. [2021-06-05 07:04:56,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) 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) [2021-06-05 07:04:56,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 4016 transitions. [2021-06-05 07:04:56,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:04:56,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:56,259 INFO L521 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] [2021-06-05 07:04:56,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 07:04:56,459 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:56,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:56,459 INFO L82 PathProgramCache]: Analyzing trace with hash -56543298, now seen corresponding path program 38 times [2021-06-05 07:04:56,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:56,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158365210] [2021-06-05 07:04:56,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:56,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:56,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:56,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158365210] [2021-06-05 07:04:56,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158365210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:56,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549082107] [2021-06-05 07:04:56,712 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 [2021-06-05 07:04:56,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:04:56,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:56,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 07:04:56,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:56,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:04:56,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:04:56,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:56,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 07:04:56,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:04:56,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:56,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:56,950 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:38 [2021-06-05 07:04:57,031 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:57,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549082107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:57,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:57,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 07:04:57,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851967631] [2021-06-05 07:04:57,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:04:57,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:57,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:04:57,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:04:57,033 INFO L87 Difference]: Start difference. First operand 1201 states and 4016 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) [2021-06-05 07:04:58,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:58,567 INFO L93 Difference]: Finished difference Result 2084 states and 6623 transitions. [2021-06-05 07:04:58,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:04:58,567 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 [2021-06-05 07:04:58,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:58,570 INFO L225 Difference]: With dead ends: 2084 [2021-06-05 07:04:58,570 INFO L226 Difference]: Without dead ends: 2069 [2021-06-05 07:04:58,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1391.7ms TimeCoverageRelationStatistics Valid=280, Invalid=1700, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 07:04:58,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2069 states. [2021-06-05 07:04:58,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2069 to 1211. [2021-06-05 07:04:58,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1210 states have (on average 3.3446280991735535) internal successors, (4047), 1210 states have internal predecessors, (4047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:58,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 4047 transitions. [2021-06-05 07:04:58,587 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 4047 transitions. Word has length 26 [2021-06-05 07:04:58,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:58,587 INFO L482 AbstractCegarLoop]: Abstraction has 1211 states and 4047 transitions. [2021-06-05 07:04:58,587 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) [2021-06-05 07:04:58,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 4047 transitions. [2021-06-05 07:04:58,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:04:58,589 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:58,589 INFO L521 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] [2021-06-05 07:04:58,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 07:04:58,789 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:58,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:58,790 INFO L82 PathProgramCache]: Analyzing trace with hash -2141610526, now seen corresponding path program 7 times [2021-06-05 07:04:58,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:58,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393336694] [2021-06-05 07:04:58,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:58,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:59,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:59,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:59,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393336694] [2021-06-05 07:04:59,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393336694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:59,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382424202] [2021-06-05 07:04:59,049 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 [2021-06-05 07:04:59,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:59,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 07:04:59,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:59,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:04:59,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:04:59,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 07:04:59,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:59,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:59,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:59,299 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 07:04:59,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:59,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382424202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:59,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:59,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 07:04:59,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907129861] [2021-06-05 07:04:59,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:04:59,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:59,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:04:59,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:04:59,323 INFO L87 Difference]: Start difference. First operand 1211 states and 4047 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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) [2021-06-05 07:04:59,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:59,945 INFO L93 Difference]: Finished difference Result 1614 states and 5256 transitions. [2021-06-05 07:04:59,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 07:04:59,945 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 [2021-06-05 07:04:59,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:59,948 INFO L225 Difference]: With dead ends: 1614 [2021-06-05 07:04:59,948 INFO L226 Difference]: Without dead ends: 1599 [2021-06-05 07:04:59,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 715.0ms TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:04:59,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2021-06-05 07:04:59,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1222. [2021-06-05 07:04:59,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1221 states have (on average 3.3415233415233416) internal successors, (4080), 1221 states have internal predecessors, (4080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:59,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 4080 transitions. [2021-06-05 07:04:59,964 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 4080 transitions. Word has length 26 [2021-06-05 07:04:59,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:59,965 INFO L482 AbstractCegarLoop]: Abstraction has 1222 states and 4080 transitions. [2021-06-05 07:04:59,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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) [2021-06-05 07:04:59,965 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 4080 transitions. [2021-06-05 07:04:59,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:04:59,966 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:59,966 INFO L521 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] [2021-06-05 07:05:00,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 07:05:00,167 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:00,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:00,167 INFO L82 PathProgramCache]: Analyzing trace with hash 124958754, now seen corresponding path program 8 times [2021-06-05 07:05:00,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:00,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808231913] [2021-06-05 07:05:00,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:00,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:00,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:00,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:00,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808231913] [2021-06-05 07:05:00,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808231913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:00,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390641620] [2021-06-05 07:05:00,363 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 [2021-06-05 07:05:00,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:05:00,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:00,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 07:05:00,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:00,599 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 07:05:00,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 64 [2021-06-05 07:05:00,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:00,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:00,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:00,622 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:105 [2021-06-05 07:05:00,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:00,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390641620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:00,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:00,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 07:05:00,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798746485] [2021-06-05 07:05:00,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:05:00,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:00,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:05:00,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:05:00,757 INFO L87 Difference]: Start difference. First operand 1222 states and 4080 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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) [2021-06-05 07:05:02,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:02,623 INFO L93 Difference]: Finished difference Result 1877 states and 5972 transitions. [2021-06-05 07:05:02,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:05:02,624 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 [2021-06-05 07:05:02,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:02,626 INFO L225 Difference]: With dead ends: 1877 [2021-06-05 07:05:02,627 INFO L226 Difference]: Without dead ends: 1862 [2021-06-05 07:05:02,627 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1571.9ms TimeCoverageRelationStatistics Valid=313, Invalid=1757, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:05:02,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2021-06-05 07:05:02,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1233. [2021-06-05 07:05:02,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1232 states have (on average 3.3506493506493507) internal successors, (4128), 1232 states have internal predecessors, (4128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:02,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 4128 transitions. [2021-06-05 07:05:02,646 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 4128 transitions. Word has length 26 [2021-06-05 07:05:02,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:02,646 INFO L482 AbstractCegarLoop]: Abstraction has 1233 states and 4128 transitions. [2021-06-05 07:05:02,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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) [2021-06-05 07:05:02,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 4128 transitions. [2021-06-05 07:05:02,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:05:02,648 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:02,648 INFO L521 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] [2021-06-05 07:05:02,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 07:05:02,848 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:02,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:02,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1812450954, now seen corresponding path program 9 times [2021-06-05 07:05:02,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:02,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849340580] [2021-06-05 07:05:02,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:02,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:03,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:03,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:03,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849340580] [2021-06-05 07:05:03,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849340580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:03,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393747136] [2021-06-05 07:05:03,034 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 [2021-06-05 07:05:03,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:05:03,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:03,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:05:03,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:03,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:05:03,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:03,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 07:05:03,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:03,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:03,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:03,323 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-06-05 07:05:03,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:03,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393747136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:03,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:03,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 07:05:03,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855168795] [2021-06-05 07:05:03,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:05:03,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:03,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:05:03,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:05:03,342 INFO L87 Difference]: Start difference. First operand 1233 states and 4128 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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) [2021-06-05 07:05:04,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:04,348 INFO L93 Difference]: Finished difference Result 1868 states and 6061 transitions. [2021-06-05 07:05:04,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 07:05:04,349 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 [2021-06-05 07:05:04,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:04,351 INFO L225 Difference]: With dead ends: 1868 [2021-06-05 07:05:04,352 INFO L226 Difference]: Without dead ends: 1853 [2021-06-05 07:05:04,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 795.8ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:05:04,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2021-06-05 07:05:04,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 1242. [2021-06-05 07:05:04,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1242 states, 1241 states have (on average 3.35535858178888) internal successors, (4164), 1241 states have internal predecessors, (4164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:04,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 4164 transitions. [2021-06-05 07:05:04,370 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 4164 transitions. Word has length 26 [2021-06-05 07:05:04,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:04,370 INFO L482 AbstractCegarLoop]: Abstraction has 1242 states and 4164 transitions. [2021-06-05 07:05:04,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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) [2021-06-05 07:05:04,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 4164 transitions. [2021-06-05 07:05:04,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:05:04,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:04,372 INFO L521 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] [2021-06-05 07:05:04,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:04,572 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:04,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:04,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1980260046, now seen corresponding path program 10 times [2021-06-05 07:05:04,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:04,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102664171] [2021-06-05 07:05:04,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:04,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:04,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:04,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:04,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102664171] [2021-06-05 07:05:04,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102664171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:04,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081259604] [2021-06-05 07:05:04,740 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 [2021-06-05 07:05:04,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:05:04,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:04,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:05:04,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:04,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:04,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:05:04,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 07:05:04,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:04,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:04,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:04,919 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 07:05:04,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:04,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081259604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:04,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:04,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 07:05:04,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520322675] [2021-06-05 07:05:04,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:05:04,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:04,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:05:04,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:05:04,940 INFO L87 Difference]: Start difference. First operand 1242 states and 4164 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2021-06-05 07:05:05,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:05,269 INFO L93 Difference]: Finished difference Result 1425 states and 4676 transitions. [2021-06-05 07:05:05,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 07:05:05,270 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 26 [2021-06-05 07:05:05,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:05,272 INFO L225 Difference]: With dead ends: 1425 [2021-06-05 07:05:05,272 INFO L226 Difference]: Without dead ends: 1410 [2021-06-05 07:05:05,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 367.4ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:05:05,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1410 states. [2021-06-05 07:05:05,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1410 to 1238. [2021-06-05 07:05:05,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 3.354890864995958) internal successors, (4150), 1237 states have internal predecessors, (4150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:05,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 4150 transitions. [2021-06-05 07:05:05,287 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 4150 transitions. Word has length 26 [2021-06-05 07:05:05,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:05,287 INFO L482 AbstractCegarLoop]: Abstraction has 1238 states and 4150 transitions. [2021-06-05 07:05:05,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2021-06-05 07:05:05,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 4150 transitions. [2021-06-05 07:05:05,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:05:05,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:05,288 INFO L521 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] [2021-06-05 07:05:05,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:05,489 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:05,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:05,489 INFO L82 PathProgramCache]: Analyzing trace with hash 247191222, now seen corresponding path program 11 times [2021-06-05 07:05:05,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:05,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172217261] [2021-06-05 07:05:05,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:05,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:05,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:05,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:05,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172217261] [2021-06-05 07:05:05,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172217261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:05,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920310913] [2021-06-05 07:05:05,702 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 [2021-06-05 07:05:05,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:05:05,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:05,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:05:05,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:05,899 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 07:05:05,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-06-05 07:05:05,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:05,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:05,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:05,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:69, output treesize:21 [2021-06-05 07:05:05,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:05,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920310913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:05,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:05,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 07:05:05,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117648109] [2021-06-05 07:05:05,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:05:05,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:05,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:05:05,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:05:05,975 INFO L87 Difference]: Start difference. First operand 1238 states and 4150 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2021-06-05 07:05:07,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:07,394 INFO L93 Difference]: Finished difference Result 2068 states and 6701 transitions. [2021-06-05 07:05:07,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:05:07,394 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 26 [2021-06-05 07:05:07,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:07,398 INFO L225 Difference]: With dead ends: 2068 [2021-06-05 07:05:07,399 INFO L226 Difference]: Without dead ends: 2053 [2021-06-05 07:05:07,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1250.6ms TimeCoverageRelationStatistics Valid=342, Invalid=1464, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:05:07,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2053 states. [2021-06-05 07:05:07,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2053 to 1241. [2021-06-05 07:05:07,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 1240 states have (on average 3.3588709677419355) internal successors, (4165), 1240 states have internal predecessors, (4165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:07,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 4165 transitions. [2021-06-05 07:05:07,418 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 4165 transitions. Word has length 26 [2021-06-05 07:05:07,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:07,419 INFO L482 AbstractCegarLoop]: Abstraction has 1241 states and 4165 transitions. [2021-06-05 07:05:07,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2021-06-05 07:05:07,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 4165 transitions. [2021-06-05 07:05:07,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:05:07,421 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:07,421 INFO L521 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] [2021-06-05 07:05:07,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 07:05:07,621 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:07,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:07,622 INFO L82 PathProgramCache]: Analyzing trace with hash 317421942, now seen corresponding path program 12 times [2021-06-05 07:05:07,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:07,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305587930] [2021-06-05 07:05:07,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:07,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:07,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:07,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:07,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305587930] [2021-06-05 07:05:07,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305587930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:07,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884153236] [2021-06-05 07:05:07,832 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 [2021-06-05 07:05:07,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:05:07,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:07,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:05:07,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:07,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:07,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:07,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:05:07,986 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:07,986 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 22 treesize of output 20 [2021-06-05 07:05:07,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:05:08,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:08,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:08,004 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:19 [2021-06-05 07:05:08,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:08,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884153236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:08,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:08,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 07:05:08,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609860631] [2021-06-05 07:05:08,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:05:08,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:08,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:05:08,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:05:08,043 INFO L87 Difference]: Start difference. First operand 1241 states and 4165 transitions. Second operand has 18 states, 18 states have (on average 2.5) 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) [2021-06-05 07:05:09,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:09,345 INFO L93 Difference]: Finished difference Result 1837 states and 5986 transitions. [2021-06-05 07:05:09,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:05:09,346 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) 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 [2021-06-05 07:05:09,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:09,349 INFO L225 Difference]: With dead ends: 1837 [2021-06-05 07:05:09,349 INFO L226 Difference]: Without dead ends: 1822 [2021-06-05 07:05:09,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1135.1ms TimeCoverageRelationStatistics Valid=293, Invalid=1347, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:05:09,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2021-06-05 07:05:09,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 1244. [2021-06-05 07:05:09,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 1243 states have (on average 3.360418342719228) internal successors, (4177), 1243 states have internal predecessors, (4177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:09,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 4177 transitions. [2021-06-05 07:05:09,375 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 4177 transitions. Word has length 26 [2021-06-05 07:05:09,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:09,375 INFO L482 AbstractCegarLoop]: Abstraction has 1244 states and 4177 transitions. [2021-06-05 07:05:09,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) 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) [2021-06-05 07:05:09,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 4177 transitions. [2021-06-05 07:05:09,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:05:09,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:09,377 INFO L521 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] [2021-06-05 07:05:09,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 07:05:09,577 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:09,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:09,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1212092298, now seen corresponding path program 13 times [2021-06-05 07:05:09,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:09,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649593581] [2021-06-05 07:05:09,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:09,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:09,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:09,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:09,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649593581] [2021-06-05 07:05:09,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649593581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:09,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829198159] [2021-06-05 07:05:09,827 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 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 [2021-06-05 07:05:09,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:09,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 07:05:09,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:10,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:10,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:05:10,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20 treesize of output 12 [2021-06-05 07:05:10,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:10,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:10,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:10,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 07:05:10,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:10,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829198159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:10,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:10,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 07:05:10,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421688462] [2021-06-05 07:05:10,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:05:10,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:10,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:05:10,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:05:10,052 INFO L87 Difference]: Start difference. First operand 1244 states and 4177 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-06-05 07:05:10,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:10,902 INFO L93 Difference]: Finished difference Result 1881 states and 6019 transitions. [2021-06-05 07:05:10,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:05:10,902 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 26 [2021-06-05 07:05:10,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:10,905 INFO L225 Difference]: With dead ends: 1881 [2021-06-05 07:05:10,905 INFO L226 Difference]: Without dead ends: 1866 [2021-06-05 07:05:10,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 784.5ms TimeCoverageRelationStatistics Valid=200, Invalid=670, Unknown=0, NotChecked=0, Total=870 [2021-06-05 07:05:10,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-06-05 07:05:10,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1246. [2021-06-05 07:05:10,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.3606425702811245) internal successors, (4184), 1245 states have internal predecessors, (4184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:10,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4184 transitions. [2021-06-05 07:05:10,922 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4184 transitions. Word has length 26 [2021-06-05 07:05:10,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:10,922 INFO L482 AbstractCegarLoop]: Abstraction has 1246 states and 4184 transitions. [2021-06-05 07:05:10,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-06-05 07:05:10,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4184 transitions. [2021-06-05 07:05:10,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:05:10,925 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:10,925 INFO L521 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] [2021-06-05 07:05:11,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:11,142 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:11,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:11,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1219202938, now seen corresponding path program 39 times [2021-06-05 07:05:11,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:11,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895450412] [2021-06-05 07:05:11,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:11,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:11,407 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:11,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:11,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895450412] [2021-06-05 07:05:11,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895450412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:11,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184811321] [2021-06-05 07:05:11,407 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 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 [2021-06-05 07:05:11,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:05:11,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:11,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:05:11,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:11,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:11,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:11,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:05:11,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:05:11,570 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 21 treesize of output 11 [2021-06-05 07:05:11,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:11,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:11,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:11,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 07:05:11,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:11,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184811321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:11,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:11,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 07:05:11,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914081802] [2021-06-05 07:05:11,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:05:11,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:11,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:05:11,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:05:11,607 INFO L87 Difference]: Start difference. First operand 1246 states and 4184 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-06-05 07:05:13,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:13,582 INFO L93 Difference]: Finished difference Result 2938 states and 9138 transitions. [2021-06-05 07:05:13,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 07:05:13,582 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 26 [2021-06-05 07:05:13,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:13,586 INFO L225 Difference]: With dead ends: 2938 [2021-06-05 07:05:13,586 INFO L226 Difference]: Without dead ends: 2893 [2021-06-05 07:05:13,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1758.0ms TimeCoverageRelationStatistics Valid=545, Invalid=2535, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 07:05:13,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2893 states. [2021-06-05 07:05:13,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2893 to 1292. [2021-06-05 07:05:13,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 3.375677769171185) internal successors, (4358), 1291 states have internal predecessors, (4358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:13,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 4358 transitions. [2021-06-05 07:05:13,607 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 4358 transitions. Word has length 26 [2021-06-05 07:05:13,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:13,607 INFO L482 AbstractCegarLoop]: Abstraction has 1292 states and 4358 transitions. [2021-06-05 07:05:13,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-06-05 07:05:13,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 4358 transitions. [2021-06-05 07:05:13,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:05:13,609 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:13,610 INFO L521 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] [2021-06-05 07:05:13,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:13,832 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:13,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:13,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1493004622, now seen corresponding path program 14 times [2021-06-05 07:05:13,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:13,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473663415] [2021-06-05 07:05:13,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:13,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:14,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:14,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:14,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473663415] [2021-06-05 07:05:14,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473663415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:14,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573846165] [2021-06-05 07:05:14,088 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 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 [2021-06-05 07:05:14,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:05:14,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:14,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:05:14,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:14,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:14,341 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:14,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 07:05:14,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:14,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:14,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:14,367 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:120 [2021-06-05 07:05:14,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:14,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573846165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:14,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:14,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 07:05:14,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350639530] [2021-06-05 07:05:14,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:05:14,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:14,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:05:14,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:05:14,526 INFO L87 Difference]: Start difference. First operand 1292 states and 4358 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 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) [2021-06-05 07:05:16,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:16,653 INFO L93 Difference]: Finished difference Result 2343 states and 7345 transitions. [2021-06-05 07:05:16,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:05:16,654 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 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 [2021-06-05 07:05:16,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:16,658 INFO L225 Difference]: With dead ends: 2343 [2021-06-05 07:05:16,658 INFO L226 Difference]: Without dead ends: 2313 [2021-06-05 07:05:16,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 2026.0ms TimeCoverageRelationStatistics Valid=406, Invalid=1756, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:05:16,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2021-06-05 07:05:16,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 1291. [2021-06-05 07:05:16,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1291 states, 1290 states have (on average 3.372093023255814) internal successors, (4350), 1290 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:16,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1291 states to 1291 states and 4350 transitions. [2021-06-05 07:05:16,684 INFO L78 Accepts]: Start accepts. Automaton has 1291 states and 4350 transitions. Word has length 26 [2021-06-05 07:05:16,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:16,684 INFO L482 AbstractCegarLoop]: Abstraction has 1291 states and 4350 transitions. [2021-06-05 07:05:16,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 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) [2021-06-05 07:05:16,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1291 states and 4350 transitions. [2021-06-05 07:05:16,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:05:16,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:16,686 INFO L521 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] [2021-06-05 07:05:16,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-05 07:05:16,886 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:16,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:16,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1417319858, now seen corresponding path program 15 times [2021-06-05 07:05:16,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:16,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105520343] [2021-06-05 07:05:16,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:16,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:17,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:17,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:17,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105520343] [2021-06-05 07:05:17,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105520343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:17,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526704997] [2021-06-05 07:05:17,073 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 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 [2021-06-05 07:05:17,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:05:17,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:17,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:05:17,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:17,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:17,337 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:17,337 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 20 treesize of output 20 [2021-06-05 07:05:17,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:05:17,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:17,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:17,351 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2021-06-05 07:05:17,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:17,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526704997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:17,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:17,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 07:05:17,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428262126] [2021-06-05 07:05:17,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:05:17,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:17,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:05:17,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:05:17,400 INFO L87 Difference]: Start difference. First operand 1291 states and 4350 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-06-05 07:05:19,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:19,047 INFO L93 Difference]: Finished difference Result 2291 states and 7285 transitions. [2021-06-05 07:05:19,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:05:19,048 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 26 [2021-06-05 07:05:19,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:19,051 INFO L225 Difference]: With dead ends: 2291 [2021-06-05 07:05:19,051 INFO L226 Difference]: Without dead ends: 2276 [2021-06-05 07:05:19,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1376.6ms TimeCoverageRelationStatistics Valid=355, Invalid=1451, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:05:19,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2276 states. [2021-06-05 07:05:19,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2276 to 1288. [2021-06-05 07:05:19,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.370629370629371) internal successors, (4338), 1287 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:19,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4338 transitions. [2021-06-05 07:05:19,089 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4338 transitions. Word has length 26 [2021-06-05 07:05:19,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:19,089 INFO L482 AbstractCegarLoop]: Abstraction has 1288 states and 4338 transitions. [2021-06-05 07:05:19,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-06-05 07:05:19,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4338 transitions. [2021-06-05 07:05:19,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:05:19,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:19,091 INFO L521 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] [2021-06-05 07:05:19,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:19,291 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:19,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:19,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1873451990, now seen corresponding path program 40 times [2021-06-05 07:05:19,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:19,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700263202] [2021-06-05 07:05:19,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:19,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:19,539 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:19,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:19,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700263202] [2021-06-05 07:05:19,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700263202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:19,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332090876] [2021-06-05 07:05:19,539 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 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 [2021-06-05 07:05:19,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:05:19,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:19,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:05:19,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:19,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:19,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:19,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:05:19,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:05:19,710 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 21 treesize of output 11 [2021-06-05 07:05:19,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:19,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:19,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:19,720 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 07:05:19,744 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:19,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332090876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:19,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:19,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 07:05:19,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314459903] [2021-06-05 07:05:19,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:05:19,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:19,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:05:19,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:05:19,745 INFO L87 Difference]: Start difference. First operand 1288 states and 4338 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-06-05 07:05:21,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:21,409 INFO L93 Difference]: Finished difference Result 2760 states and 8712 transitions. [2021-06-05 07:05:21,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 07:05:21,409 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 26 [2021-06-05 07:05:21,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:21,413 INFO L225 Difference]: With dead ends: 2760 [2021-06-05 07:05:21,413 INFO L226 Difference]: Without dead ends: 2715 [2021-06-05 07:05:21,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1573.7ms TimeCoverageRelationStatistics Valid=462, Invalid=1988, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:05:21,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2715 states. [2021-06-05 07:05:21,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2715 to 1284. [2021-06-05 07:05:21,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1284 states, 1283 states have (on average 3.3795791114575215) internal successors, (4336), 1283 states have internal predecessors, (4336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:21,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1284 states to 1284 states and 4336 transitions. [2021-06-05 07:05:21,433 INFO L78 Accepts]: Start accepts. Automaton has 1284 states and 4336 transitions. Word has length 26 [2021-06-05 07:05:21,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:21,433 INFO L482 AbstractCegarLoop]: Abstraction has 1284 states and 4336 transitions. [2021-06-05 07:05:21,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-06-05 07:05:21,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1284 states and 4336 transitions. [2021-06-05 07:05:21,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:05:21,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:21,435 INFO L521 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] [2021-06-05 07:05:21,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:21,637 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:21,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:21,637 INFO L82 PathProgramCache]: Analyzing trace with hash -39803338, now seen corresponding path program 41 times [2021-06-05 07:05:21,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:21,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646619866] [2021-06-05 07:05:21,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:21,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:21,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:21,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:21,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646619866] [2021-06-05 07:05:21,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646619866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:21,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333062572] [2021-06-05 07:05:21,867 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 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 [2021-06-05 07:05:21,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:05:21,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:21,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 07:05:21,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:22,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:22,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:22,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:22,041 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 21 treesize of output 39 [2021-06-05 07:05:22,069 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 07:05:22,089 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-06-05 07:05:22,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:22,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-06-05 07:05:22,151 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:22,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333062572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:22,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:22,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 07:05:22,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975805721] [2021-06-05 07:05:22,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:05:22,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:22,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:05:22,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:05:22,152 INFO L87 Difference]: Start difference. First operand 1284 states and 4336 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-06-05 07:05:24,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:24,565 INFO L93 Difference]: Finished difference Result 3079 states and 9642 transitions. [2021-06-05 07:05:24,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 07:05:24,566 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 26 [2021-06-05 07:05:24,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:24,570 INFO L225 Difference]: With dead ends: 3079 [2021-06-05 07:05:24,570 INFO L226 Difference]: Without dead ends: 3034 [2021-06-05 07:05:24,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 2027.6ms TimeCoverageRelationStatistics Valid=623, Invalid=2457, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 07:05:24,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3034 states. [2021-06-05 07:05:24,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3034 to 1288. [2021-06-05 07:05:24,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.3853923853923855) internal successors, (4357), 1287 states have internal predecessors, (4357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:24,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4357 transitions. [2021-06-05 07:05:24,605 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4357 transitions. Word has length 26 [2021-06-05 07:05:24,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:24,605 INFO L482 AbstractCegarLoop]: Abstraction has 1288 states and 4357 transitions. [2021-06-05 07:05:24,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-06-05 07:05:24,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4357 transitions. [2021-06-05 07:05:24,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:05:24,608 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:24,608 INFO L521 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] [2021-06-05 07:05:24,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:24,821 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:24,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:24,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1882815202, now seen corresponding path program 16 times [2021-06-05 07:05:24,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:24,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418280406] [2021-06-05 07:05:24,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:24,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:25,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:25,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:25,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418280406] [2021-06-05 07:05:25,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418280406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:25,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285631413] [2021-06-05 07:05:25,087 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) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:25,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:05:25,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:25,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 07:05:25,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:25,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:25,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:05:25,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20 treesize of output 12 [2021-06-05 07:05:25,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:25,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:25,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:25,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 07:05:25,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:25,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285631413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:25,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:25,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 07:05:25,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448000756] [2021-06-05 07:05:25,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:05:25,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:25,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:05:25,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:05:25,312 INFO L87 Difference]: Start difference. First operand 1288 states and 4357 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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) [2021-06-05 07:05:25,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:25,780 INFO L93 Difference]: Finished difference Result 1650 states and 5457 transitions. [2021-06-05 07:05:25,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:05:25,781 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 [2021-06-05 07:05:25,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:25,783 INFO L225 Difference]: With dead ends: 1650 [2021-06-05 07:05:25,783 INFO L226 Difference]: Without dead ends: 1635 [2021-06-05 07:05:25,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 579.5ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:05:25,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-06-05 07:05:25,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1305. [2021-06-05 07:05:25,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1305 states, 1304 states have (on average 3.3803680981595092) internal successors, (4408), 1304 states have internal predecessors, (4408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:25,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 4408 transitions. [2021-06-05 07:05:25,801 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 4408 transitions. Word has length 26 [2021-06-05 07:05:25,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:25,801 INFO L482 AbstractCegarLoop]: Abstraction has 1305 states and 4408 transitions. [2021-06-05 07:05:25,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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) [2021-06-05 07:05:25,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 4408 transitions. [2021-06-05 07:05:25,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:05:25,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:25,804 INFO L521 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] [2021-06-05 07:05:26,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:26,017 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:26,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:26,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1110153644, now seen corresponding path program 17 times [2021-06-05 07:05:26,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:26,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106315620] [2021-06-05 07:05:26,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:26,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:26,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:26,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:26,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106315620] [2021-06-05 07:05:26,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106315620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:26,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626388644] [2021-06-05 07:05:26,249 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 [2021-06-05 07:05:26,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:05:26,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:26,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 07:05:26,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:26,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:26,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:05:26,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20 treesize of output 12 [2021-06-05 07:05:26,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:26,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:26,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:26,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 07:05:26,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:26,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626388644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:26,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:26,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 07:05:26,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735167168] [2021-06-05 07:05:26,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:05:26,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:26,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:05:26,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:05:26,579 INFO L87 Difference]: Start difference. First operand 1305 states and 4408 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 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) [2021-06-05 07:05:27,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:27,176 INFO L93 Difference]: Finished difference Result 1637 states and 5415 transitions. [2021-06-05 07:05:27,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 07:05:27,177 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 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 [2021-06-05 07:05:27,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:27,179 INFO L225 Difference]: With dead ends: 1637 [2021-06-05 07:05:27,179 INFO L226 Difference]: Without dead ends: 1622 [2021-06-05 07:05:27,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 759.4ms TimeCoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:05:27,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-06-05 07:05:27,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1297. [2021-06-05 07:05:27,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 3.385030864197531) internal successors, (4387), 1296 states have internal predecessors, (4387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:27,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4387 transitions. [2021-06-05 07:05:27,197 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4387 transitions. Word has length 26 [2021-06-05 07:05:27,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:27,197 INFO L482 AbstractCegarLoop]: Abstraction has 1297 states and 4387 transitions. [2021-06-05 07:05:27,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 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) [2021-06-05 07:05:27,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4387 transitions. [2021-06-05 07:05:27,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:05:27,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:27,199 INFO L521 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] [2021-06-05 07:05:27,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-06-05 07:05:27,400 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:27,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:27,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1553655630, now seen corresponding path program 18 times [2021-06-05 07:05:27,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:27,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248743363] [2021-06-05 07:05:27,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:27,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:27,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:27,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:27,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248743363] [2021-06-05 07:05:27,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248743363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:27,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806100115] [2021-06-05 07:05:27,591 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 [2021-06-05 07:05:27,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:05:27,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:27,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:05:27,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:27,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:27,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:05:27,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20 treesize of output 12 [2021-06-05 07:05:27,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:27,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:27,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:27,865 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-06-05 07:05:27,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:27,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806100115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:27,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:27,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 07:05:27,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55580907] [2021-06-05 07:05:27,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:05:27,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:27,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:05:27,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:05:27,882 INFO L87 Difference]: Start difference. First operand 1297 states and 4387 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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) [2021-06-05 07:05:28,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:28,627 INFO L93 Difference]: Finished difference Result 1880 states and 6175 transitions. [2021-06-05 07:05:28,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 07:05:28,627 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 [2021-06-05 07:05:28,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:28,629 INFO L225 Difference]: With dead ends: 1880 [2021-06-05 07:05:28,629 INFO L226 Difference]: Without dead ends: 1865 [2021-06-05 07:05:28,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 711.2ms TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2021-06-05 07:05:28,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1865 states. [2021-06-05 07:05:28,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1865 to 1306. [2021-06-05 07:05:28,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 3.389272030651341) internal successors, (4423), 1305 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:28,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 4423 transitions. [2021-06-05 07:05:28,650 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 4423 transitions. Word has length 26 [2021-06-05 07:05:28,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:28,650 INFO L482 AbstractCegarLoop]: Abstraction has 1306 states and 4423 transitions. [2021-06-05 07:05:28,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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) [2021-06-05 07:05:28,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 4423 transitions. [2021-06-05 07:05:28,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:05:28,652 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:28,652 INFO L521 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] [2021-06-05 07:05:28,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:28,852 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:28,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:28,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1721464722, now seen corresponding path program 19 times [2021-06-05 07:05:28,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:28,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896346191] [2021-06-05 07:05:28,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:28,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:29,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:29,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:29,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896346191] [2021-06-05 07:05:29,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896346191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:29,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969942258] [2021-06-05 07:05:29,047 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 [2021-06-05 07:05:29,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:29,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:05:29,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:29,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:29,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:05:29,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 07:05:29,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:29,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:29,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:29,225 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 07:05:29,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:29,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969942258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:29,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:29,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 07:05:29,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319688746] [2021-06-05 07:05:29,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:05:29,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:29,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:05:29,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:05:29,249 INFO L87 Difference]: Start difference. First operand 1306 states and 4423 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2021-06-05 07:05:29,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:29,477 INFO L93 Difference]: Finished difference Result 1472 states and 4885 transitions. [2021-06-05 07:05:29,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 07:05:29,477 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 26 [2021-06-05 07:05:29,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:29,480 INFO L225 Difference]: With dead ends: 1472 [2021-06-05 07:05:29,480 INFO L226 Difference]: Without dead ends: 1457 [2021-06-05 07:05:29,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 324.0ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:05:29,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1457 states. [2021-06-05 07:05:29,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1457 to 1300. [2021-06-05 07:05:29,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1299 states have (on average 3.3887605850654348) internal successors, (4402), 1299 states have internal predecessors, (4402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:29,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 4402 transitions. [2021-06-05 07:05:29,501 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 4402 transitions. Word has length 26 [2021-06-05 07:05:29,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:29,501 INFO L482 AbstractCegarLoop]: Abstraction has 1300 states and 4402 transitions. [2021-06-05 07:05:29,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2021-06-05 07:05:29,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 4402 transitions. [2021-06-05 07:05:29,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:05:29,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:29,504 INFO L521 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] [2021-06-05 07:05:29,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-06-05 07:05:29,721 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:29,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:29,722 INFO L82 PathProgramCache]: Analyzing trace with hash 505986546, now seen corresponding path program 20 times [2021-06-05 07:05:29,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:29,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380603077] [2021-06-05 07:05:29,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:29,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:29,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:29,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:29,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380603077] [2021-06-05 07:05:29,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380603077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:29,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321658037] [2021-06-05 07:05:29,935 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 [2021-06-05 07:05:29,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:05:29,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:29,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:05:29,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:30,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:30,137 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:30,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 07:05:30,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:30,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:30,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 07:05:30,159 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:75 [2021-06-05 07:05:30,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:30,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321658037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:30,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:30,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 07:05:30,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706866026] [2021-06-05 07:05:30,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:05:30,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:30,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:05:30,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:05:30,239 INFO L87 Difference]: Start difference. First operand 1300 states and 4402 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-06-05 07:05:31,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:31,218 INFO L93 Difference]: Finished difference Result 2107 states and 6896 transitions. [2021-06-05 07:05:31,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:05:31,219 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 26 [2021-06-05 07:05:31,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:31,221 INFO L225 Difference]: With dead ends: 2107 [2021-06-05 07:05:31,221 INFO L226 Difference]: Without dead ends: 2092 [2021-06-05 07:05:31,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 968.5ms TimeCoverageRelationStatistics Valid=229, Invalid=893, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 07:05:31,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2021-06-05 07:05:31,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 1297. [2021-06-05 07:05:31,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 3.385030864197531) internal successors, (4387), 1296 states have internal predecessors, (4387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:31,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4387 transitions. [2021-06-05 07:05:31,240 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4387 transitions. Word has length 26 [2021-06-05 07:05:31,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:31,240 INFO L482 AbstractCegarLoop]: Abstraction has 1297 states and 4387 transitions. [2021-06-05 07:05:31,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-06-05 07:05:31,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4387 transitions. [2021-06-05 07:05:31,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:05:31,242 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:31,242 INFO L521 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] [2021-06-05 07:05:31,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:31,443 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:31,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:31,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1484642536, now seen corresponding path program 21 times [2021-06-05 07:05:31,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:31,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518196368] [2021-06-05 07:05:31,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:31,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:31,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:31,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:31,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518196368] [2021-06-05 07:05:31,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518196368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:31,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467368349] [2021-06-05 07:05:31,649 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 [2021-06-05 07:05:31,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:05:31,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:31,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:05:31,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:31,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:31,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:05:31,900 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 20 treesize of output 12 [2021-06-05 07:05:31,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:31,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:31,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:31,905 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 07:05:31,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:31,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467368349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:31,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:31,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 07:05:31,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454945876] [2021-06-05 07:05:31,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:05:31,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:31,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:05:31,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:05:31,926 INFO L87 Difference]: Start difference. First operand 1297 states and 4387 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) 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) [2021-06-05 07:05:33,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:33,075 INFO L93 Difference]: Finished difference Result 1853 states and 6048 transitions. [2021-06-05 07:05:33,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:05:33,076 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) 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 [2021-06-05 07:05:33,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:33,078 INFO L225 Difference]: With dead ends: 1853 [2021-06-05 07:05:33,078 INFO L226 Difference]: Without dead ends: 1838 [2021-06-05 07:05:33,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1005.2ms TimeCoverageRelationStatistics Valid=211, Invalid=1049, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:05:33,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1838 states. [2021-06-05 07:05:33,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1838 to 1293. [2021-06-05 07:05:33,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 1292 states have (on average 3.3823529411764706) internal successors, (4370), 1292 states have internal predecessors, (4370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:33,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 4370 transitions. [2021-06-05 07:05:33,097 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 4370 transitions. Word has length 26 [2021-06-05 07:05:33,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:33,097 INFO L482 AbstractCegarLoop]: Abstraction has 1293 states and 4370 transitions. [2021-06-05 07:05:33,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) 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) [2021-06-05 07:05:33,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 4370 transitions. [2021-06-05 07:05:33,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:05:33,099 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:33,099 INFO L521 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] [2021-06-05 07:05:33,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 07:05:33,300 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:33,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:33,300 INFO L82 PathProgramCache]: Analyzing trace with hash -2091148486, now seen corresponding path program 22 times [2021-06-05 07:05:33,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:33,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938735397] [2021-06-05 07:05:33,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:33,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:33,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:33,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:33,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938735397] [2021-06-05 07:05:33,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938735397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:33,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969693350] [2021-06-05 07:05:33,543 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 [2021-06-05 07:05:33,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:05:33,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:33,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 07:05:33,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:33,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:33,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:05:33,740 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 07:05:33,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:33,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:33,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:33,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 07:05:33,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:33,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969693350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:33,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:33,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 07:05:33,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53617545] [2021-06-05 07:05:33,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:05:33,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:33,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:05:33,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:05:33,762 INFO L87 Difference]: Start difference. First operand 1293 states and 4370 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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) [2021-06-05 07:05:34,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:34,339 INFO L93 Difference]: Finished difference Result 1726 states and 5675 transitions. [2021-06-05 07:05:34,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:05:34,340 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 [2021-06-05 07:05:34,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:34,342 INFO L225 Difference]: With dead ends: 1726 [2021-06-05 07:05:34,342 INFO L226 Difference]: Without dead ends: 1705 [2021-06-05 07:05:34,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 547.1ms TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:05:34,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2021-06-05 07:05:34,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1334. [2021-06-05 07:05:34,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1333 states have (on average 3.377344336084021) internal successors, (4502), 1333 states have internal predecessors, (4502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:34,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 4502 transitions. [2021-06-05 07:05:34,360 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 4502 transitions. Word has length 26 [2021-06-05 07:05:34,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:34,360 INFO L482 AbstractCegarLoop]: Abstraction has 1334 states and 4502 transitions. [2021-06-05 07:05:34,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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) [2021-06-05 07:05:34,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 4502 transitions. [2021-06-05 07:05:34,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:05:34,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:34,362 INFO L521 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] [2021-06-05 07:05:34,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:34,563 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:34,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:34,563 INFO L82 PathProgramCache]: Analyzing trace with hash 2036009718, now seen corresponding path program 23 times [2021-06-05 07:05:34,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:34,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954774471] [2021-06-05 07:05:34,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:34,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:34,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:34,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:34,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954774471] [2021-06-05 07:05:34,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954774471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:34,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41662285] [2021-06-05 07:05:34,818 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 [2021-06-05 07:05:34,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:05:34,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:34,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 07:05:34,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:35,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:35,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:05:35,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 22 treesize of output 12 [2021-06-05 07:05:35,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:35,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:35,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:35,026 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:5 [2021-06-05 07:05:35,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:35,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41662285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:35,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:35,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 07:05:35,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244576777] [2021-06-05 07:05:35,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:05:35,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:35,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:05:35,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:05:35,051 INFO L87 Difference]: Start difference. First operand 1334 states and 4502 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2021-06-05 07:05:35,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:35,534 INFO L93 Difference]: Finished difference Result 1470 states and 4841 transitions. [2021-06-05 07:05:35,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 07:05:35,534 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 26 [2021-06-05 07:05:35,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:35,536 INFO L225 Difference]: With dead ends: 1470 [2021-06-05 07:05:35,536 INFO L226 Difference]: Without dead ends: 1451 [2021-06-05 07:05:35,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 509.4ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:05:35,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2021-06-05 07:05:35,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1328. [2021-06-05 07:05:35,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 1327 states have (on average 3.376789751318764) internal successors, (4481), 1327 states have internal predecessors, (4481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:35,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 4481 transitions. [2021-06-05 07:05:35,552 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 4481 transitions. Word has length 26 [2021-06-05 07:05:35,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:35,552 INFO L482 AbstractCegarLoop]: Abstraction has 1328 states and 4481 transitions. [2021-06-05 07:05:35,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2021-06-05 07:05:35,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 4481 transitions. [2021-06-05 07:05:35,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:05:35,554 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:35,554 INFO L521 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] [2021-06-05 07:05:35,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 07:05:35,755 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:35,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:35,755 INFO L82 PathProgramCache]: Analyzing trace with hash -31506310, now seen corresponding path program 24 times [2021-06-05 07:05:35,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:35,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392349473] [2021-06-05 07:05:35,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:35,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:35,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:35,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:35,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392349473] [2021-06-05 07:05:35,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392349473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:35,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821618551] [2021-06-05 07:05:35,959 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 [2021-06-05 07:05:35,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:05:35,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:35,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 07:05:35,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:36,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:36,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:36,108 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:36,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 22 [2021-06-05 07:05:36,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:05:36,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:36,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:36,119 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:28 [2021-06-05 07:05:36,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:36,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821618551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:36,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:36,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 07:05:36,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998041997] [2021-06-05 07:05:36,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:05:36,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:36,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:05:36,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:05:36,171 INFO L87 Difference]: Start difference. First operand 1328 states and 4481 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-06-05 07:05:36,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:36,865 INFO L93 Difference]: Finished difference Result 1962 states and 6398 transitions. [2021-06-05 07:05:36,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:05:36,866 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 26 [2021-06-05 07:05:36,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:36,868 INFO L225 Difference]: With dead ends: 1962 [2021-06-05 07:05:36,869 INFO L226 Difference]: Without dead ends: 1937 [2021-06-05 07:05:36,869 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 645.7ms TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:05:36,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2021-06-05 07:05:36,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1331. [2021-06-05 07:05:36,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1331 states, 1330 states have (on average 3.3774436090225564) internal successors, (4492), 1330 states have internal predecessors, (4492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:36,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 4492 transitions. [2021-06-05 07:05:36,887 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 4492 transitions. Word has length 26 [2021-06-05 07:05:36,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:36,887 INFO L482 AbstractCegarLoop]: Abstraction has 1331 states and 4492 transitions. [2021-06-05 07:05:36,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-06-05 07:05:36,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 4492 transitions. [2021-06-05 07:05:36,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:05:36,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:36,889 INFO L521 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] [2021-06-05 07:05:37,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 07:05:37,090 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:37,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:37,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1960184130, now seen corresponding path program 25 times [2021-06-05 07:05:37,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:37,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760181771] [2021-06-05 07:05:37,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:37,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:37,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:37,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:37,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760181771] [2021-06-05 07:05:37,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760181771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:37,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747626410] [2021-06-05 07:05:37,299 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 [2021-06-05 07:05:37,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:37,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:05:37,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:37,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:37,496 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 07:05:37,496 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 36 [2021-06-05 07:05:37,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:37,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:37,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:37,502 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:5 [2021-06-05 07:05:37,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:37,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747626410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:37,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:37,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 07:05:37,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118884784] [2021-06-05 07:05:37,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:05:37,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:37,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:05:37,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:05:37,534 INFO L87 Difference]: Start difference. First operand 1331 states and 4492 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2021-06-05 07:05:37,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:37,792 INFO L93 Difference]: Finished difference Result 1522 states and 5028 transitions. [2021-06-05 07:05:37,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 07:05:37,793 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 26 [2021-06-05 07:05:37,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:37,795 INFO L225 Difference]: With dead ends: 1522 [2021-06-05 07:05:37,795 INFO L226 Difference]: Without dead ends: 1507 [2021-06-05 07:05:37,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 345.8ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:05:37,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2021-06-05 07:05:37,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1337. [2021-06-05 07:05:37,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1336 states have (on average 3.379491017964072) internal successors, (4515), 1336 states have internal predecessors, (4515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:37,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 4515 transitions. [2021-06-05 07:05:37,810 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 4515 transitions. Word has length 26 [2021-06-05 07:05:37,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:37,810 INFO L482 AbstractCegarLoop]: Abstraction has 1337 states and 4515 transitions. [2021-06-05 07:05:37,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2021-06-05 07:05:37,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 4515 transitions. [2021-06-05 07:05:37,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:05:37,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:37,812 INFO L521 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] [2021-06-05 07:05:38,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 07:05:38,012 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:38,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:38,012 INFO L82 PathProgramCache]: Analyzing trace with hash -389358530, now seen corresponding path program 26 times [2021-06-05 07:05:38,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:38,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733666288] [2021-06-05 07:05:38,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:38,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:38,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:38,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:38,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733666288] [2021-06-05 07:05:38,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733666288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:38,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331193059] [2021-06-05 07:05:38,272 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 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 [2021-06-05 07:05:38,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:05:38,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:38,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:05:38,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:38,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:38,459 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:38,459 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 20 treesize of output 20 [2021-06-05 07:05:38,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:05:38,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:38,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:38,468 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-06-05 07:05:38,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:38,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331193059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:38,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:38,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 07:05:38,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465358941] [2021-06-05 07:05:38,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:05:38,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:38,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:05:38,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:05:38,519 INFO L87 Difference]: Start difference. First operand 1337 states and 4515 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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) [2021-06-05 07:05:39,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:39,072 INFO L93 Difference]: Finished difference Result 1802 states and 5923 transitions. [2021-06-05 07:05:39,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 07:05:39,072 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 [2021-06-05 07:05:39,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:39,075 INFO L225 Difference]: With dead ends: 1802 [2021-06-05 07:05:39,075 INFO L226 Difference]: Without dead ends: 1777 [2021-06-05 07:05:39,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 664.6ms TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:05:39,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2021-06-05 07:05:39,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1344. [2021-06-05 07:05:39,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1343 states have (on average 3.3842144452717795) internal successors, (4545), 1343 states have internal predecessors, (4545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:39,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 4545 transitions. [2021-06-05 07:05:39,092 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 4545 transitions. Word has length 26 [2021-06-05 07:05:39,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:39,092 INFO L482 AbstractCegarLoop]: Abstraction has 1344 states and 4545 transitions. [2021-06-05 07:05:39,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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) [2021-06-05 07:05:39,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 4545 transitions. [2021-06-05 07:05:39,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:05:39,094 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:39,094 INFO L521 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] [2021-06-05 07:05:39,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:39,294 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:39,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:39,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1800748254, now seen corresponding path program 27 times [2021-06-05 07:05:39,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:39,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044630467] [2021-06-05 07:05:39,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:39,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:39,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:39,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:39,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044630467] [2021-06-05 07:05:39,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044630467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:39,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117437790] [2021-06-05 07:05:39,495 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 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 [2021-06-05 07:05:39,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:05:39,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:39,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 07:05:39,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:39,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:39,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:05:39,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 07:05:39,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:39,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:39,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:39,686 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 07:05:39,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:39,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117437790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:39,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:39,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 07:05:39,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836112434] [2021-06-05 07:05:39,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:05:39,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:39,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:05:39,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:05:39,704 INFO L87 Difference]: Start difference. First operand 1344 states and 4545 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-06-05 07:05:40,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:40,227 INFO L93 Difference]: Finished difference Result 1709 states and 5671 transitions. [2021-06-05 07:05:40,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:05:40,227 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 26 [2021-06-05 07:05:40,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:40,229 INFO L225 Difference]: With dead ends: 1709 [2021-06-05 07:05:40,229 INFO L226 Difference]: Without dead ends: 1694 [2021-06-05 07:05:40,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 517.2ms TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:05:40,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2021-06-05 07:05:40,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 1355. [2021-06-05 07:05:40,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1355 states, 1354 states have (on average 3.3840472673559825) internal successors, (4582), 1354 states have internal predecessors, (4582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:40,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 4582 transitions. [2021-06-05 07:05:40,245 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 4582 transitions. Word has length 26 [2021-06-05 07:05:40,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:40,245 INFO L482 AbstractCegarLoop]: Abstraction has 1355 states and 4582 transitions. [2021-06-05 07:05:40,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-06-05 07:05:40,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 4582 transitions. [2021-06-05 07:05:40,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:05:40,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:40,246 INFO L521 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] [2021-06-05 07:05:40,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-06-05 07:05:40,447 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:40,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:40,447 INFO L82 PathProgramCache]: Analyzing trace with hash 183215474, now seen corresponding path program 28 times [2021-06-05 07:05:40,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:40,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940752689] [2021-06-05 07:05:40,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:40,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:40,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:40,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:40,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940752689] [2021-06-05 07:05:40,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940752689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:40,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43582732] [2021-06-05 07:05:40,681 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 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 [2021-06-05 07:05:40,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:05:40,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:40,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 07:05:40,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:40,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:40,863 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:40,863 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 20 treesize of output 20 [2021-06-05 07:05:40,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:05:40,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:40,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:40,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2021-06-05 07:05:40,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:40,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43582732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:40,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:40,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 07:05:40,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661539748] [2021-06-05 07:05:40,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:05:40,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:40,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:05:40,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:05:40,922 INFO L87 Difference]: Start difference. First operand 1355 states and 4582 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-06-05 07:05:41,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:41,689 INFO L93 Difference]: Finished difference Result 2043 states and 6705 transitions. [2021-06-05 07:05:41,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:05:41,689 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 26 [2021-06-05 07:05:41,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:41,692 INFO L225 Difference]: With dead ends: 2043 [2021-06-05 07:05:41,692 INFO L226 Difference]: Without dead ends: 2024 [2021-06-05 07:05:41,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 742.9ms TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 07:05:41,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2024 states. [2021-06-05 07:05:41,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2024 to 1356. [2021-06-05 07:05:41,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 3.3874538745387452) internal successors, (4590), 1355 states have internal predecessors, (4590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:41,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 4590 transitions. [2021-06-05 07:05:41,712 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 4590 transitions. Word has length 26 [2021-06-05 07:05:41,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:41,712 INFO L482 AbstractCegarLoop]: Abstraction has 1356 states and 4590 transitions. [2021-06-05 07:05:41,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-06-05 07:05:41,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 4590 transitions. [2021-06-05 07:05:41,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:05:41,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:41,714 INFO L521 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] [2021-06-05 07:05:41,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:41,914 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:41,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:41,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1506727430, now seen corresponding path program 29 times [2021-06-05 07:05:41,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:41,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440681682] [2021-06-05 07:05:41,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:41,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:42,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:42,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:42,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440681682] [2021-06-05 07:05:42,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440681682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:42,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679995895] [2021-06-05 07:05:42,154 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 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 [2021-06-05 07:05:42,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:05:42,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:42,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:05:42,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:42,405 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 07:05:42,405 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-06-05 07:05:42,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:42,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:42,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:42,416 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:69, output treesize:21 [2021-06-05 07:05:42,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:42,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679995895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:42,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:42,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 07:05:42,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433128160] [2021-06-05 07:05:42,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:05:42,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:42,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:05:42,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:05:42,468 INFO L87 Difference]: Start difference. First operand 1356 states and 4590 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2021-06-05 07:05:43,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:43,195 INFO L93 Difference]: Finished difference Result 2000 states and 6546 transitions. [2021-06-05 07:05:43,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:05:43,195 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 26 [2021-06-05 07:05:43,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:43,198 INFO L225 Difference]: With dead ends: 2000 [2021-06-05 07:05:43,198 INFO L226 Difference]: Without dead ends: 1950 [2021-06-05 07:05:43,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 805.2ms TimeCoverageRelationStatistics Valid=207, Invalid=983, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:05:43,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1950 states. [2021-06-05 07:05:43,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1950 to 1356. [2021-06-05 07:05:43,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 3.3874538745387452) internal successors, (4590), 1355 states have internal predecessors, (4590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:43,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 4590 transitions. [2021-06-05 07:05:43,214 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 4590 transitions. Word has length 26 [2021-06-05 07:05:43,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:43,214 INFO L482 AbstractCegarLoop]: Abstraction has 1356 states and 4590 transitions. [2021-06-05 07:05:43,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2021-06-05 07:05:43,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 4590 transitions. [2021-06-05 07:05:43,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:05:43,216 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:43,216 INFO L521 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] [2021-06-05 07:05:43,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 07:05:43,417 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:43,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:43,417 INFO L82 PathProgramCache]: Analyzing trace with hash -132958662, now seen corresponding path program 42 times [2021-06-05 07:05:43,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:43,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130383882] [2021-06-05 07:05:43,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:43,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:43,699 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:43,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:43,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130383882] [2021-06-05 07:05:43,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130383882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:43,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527441370] [2021-06-05 07:05:43,699 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 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 [2021-06-05 07:05:43,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:05:43,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:43,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 07:05:43,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:43,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:43,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:05:43,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:05:43,913 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 21 treesize of output 11 [2021-06-05 07:05:43,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:43,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:43,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:43,922 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 07:05:43,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:43,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527441370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:43,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:43,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 07:05:43,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813420258] [2021-06-05 07:05:43,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:05:43,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:43,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:05:43,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:05:43,941 INFO L87 Difference]: Start difference. First operand 1356 states and 4590 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) [2021-06-05 07:05:44,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:44,749 INFO L93 Difference]: Finished difference Result 1907 states and 6150 transitions. [2021-06-05 07:05:44,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:05:44,749 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 [2021-06-05 07:05:44,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:44,752 INFO L225 Difference]: With dead ends: 1907 [2021-06-05 07:05:44,752 INFO L226 Difference]: Without dead ends: 1855 [2021-06-05 07:05:44,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 917.0ms TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:05:44,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1855 states. [2021-06-05 07:05:44,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1855 to 1390. [2021-06-05 07:05:44,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 3.375809935205184) internal successors, (4689), 1389 states have internal predecessors, (4689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:44,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 4689 transitions. [2021-06-05 07:05:44,768 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 4689 transitions. Word has length 26 [2021-06-05 07:05:44,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:44,768 INFO L482 AbstractCegarLoop]: Abstraction has 1390 states and 4689 transitions. [2021-06-05 07:05:44,768 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) [2021-06-05 07:05:44,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 4689 transitions. [2021-06-05 07:05:44,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:05:44,770 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:44,770 INFO L521 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] [2021-06-05 07:05:44,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 07:05:44,973 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:44,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:44,973 INFO L82 PathProgramCache]: Analyzing trace with hash 934915902, now seen corresponding path program 43 times [2021-06-05 07:05:44,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:44,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634156134] [2021-06-05 07:05:44,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:44,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:45,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:45,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:45,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634156134] [2021-06-05 07:05:45,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634156134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:45,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989866356] [2021-06-05 07:05:45,200 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 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 [2021-06-05 07:05:45,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:45,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:05:45,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:45,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:45,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:45,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:05:45,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:05:45,347 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 21 treesize of output 11 [2021-06-05 07:05:45,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:45,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:45,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:45,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 07:05:45,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:45,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989866356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:45,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:45,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 07:05:45,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236874886] [2021-06-05 07:05:45,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:05:45,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:45,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:05:45,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:05:45,375 INFO L87 Difference]: Start difference. First operand 1390 states and 4689 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) 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) [2021-06-05 07:05:46,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:46,411 INFO L93 Difference]: Finished difference Result 1968 states and 6459 transitions. [2021-06-05 07:05:46,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:05:46,411 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) 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 26 [2021-06-05 07:05:46,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:46,414 INFO L225 Difference]: With dead ends: 1968 [2021-06-05 07:05:46,414 INFO L226 Difference]: Without dead ends: 1953 [2021-06-05 07:05:46,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 978.9ms TimeCoverageRelationStatistics Valid=275, Invalid=1131, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 07:05:46,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2021-06-05 07:05:46,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1398. [2021-06-05 07:05:46,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 3.3707945597709377) internal successors, (4709), 1397 states have internal predecessors, (4709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:46,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4709 transitions. [2021-06-05 07:05:46,431 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4709 transitions. Word has length 26 [2021-06-05 07:05:46,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:46,431 INFO L482 AbstractCegarLoop]: Abstraction has 1398 states and 4709 transitions. [2021-06-05 07:05:46,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) 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) [2021-06-05 07:05:46,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4709 transitions. [2021-06-05 07:05:46,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:05:46,433 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:46,433 INFO L521 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] [2021-06-05 07:05:46,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 07:05:46,634 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:46,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:46,634 INFO L82 PathProgramCache]: Analyzing trace with hash 346540478, now seen corresponding path program 30 times [2021-06-05 07:05:46,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:46,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072278410] [2021-06-05 07:05:46,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:46,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:46,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:46,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:46,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072278410] [2021-06-05 07:05:46,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072278410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:46,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374226423] [2021-06-05 07:05:46,839 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 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 [2021-06-05 07:05:46,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:05:46,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:46,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:05:46,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:47,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:47,039 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:47,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20 treesize of output 28 [2021-06-05 07:05:47,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:47,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:47,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:47,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:98 [2021-06-05 07:05:47,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:47,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374226423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:47,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:47,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 07:05:47,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110305243] [2021-06-05 07:05:47,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:05:47,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:47,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:05:47,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:05:47,242 INFO L87 Difference]: Start difference. First operand 1398 states and 4709 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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) [2021-06-05 07:05:49,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:49,654 INFO L93 Difference]: Finished difference Result 2366 states and 7465 transitions. [2021-06-05 07:05:49,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 07:05:49,654 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 [2021-06-05 07:05:49,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:49,657 INFO L225 Difference]: With dead ends: 2366 [2021-06-05 07:05:49,657 INFO L226 Difference]: Without dead ends: 2332 [2021-06-05 07:05:49,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 2182.5ms TimeCoverageRelationStatistics Valid=441, Invalid=2109, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:05:49,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2021-06-05 07:05:49,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 1421. [2021-06-05 07:05:49,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1421 states, 1420 states have (on average 3.3816901408450706) internal successors, (4802), 1420 states have internal predecessors, (4802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:49,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 4802 transitions. [2021-06-05 07:05:49,677 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 4802 transitions. Word has length 26 [2021-06-05 07:05:49,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:49,678 INFO L482 AbstractCegarLoop]: Abstraction has 1421 states and 4802 transitions. [2021-06-05 07:05:49,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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) [2021-06-05 07:05:49,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 4802 transitions. [2021-06-05 07:05:49,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:05:49,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:49,679 INFO L521 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] [2021-06-05 07:05:49,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:49,880 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:49,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:49,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1896922042, now seen corresponding path program 44 times [2021-06-05 07:05:49,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:49,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869315146] [2021-06-05 07:05:49,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:49,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:50,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:50,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:50,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869315146] [2021-06-05 07:05:50,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869315146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:50,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996066] [2021-06-05 07:05:50,217 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:50,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:05:50,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:50,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 07:05:50,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:50,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:50,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:50,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:50,476 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:50,476 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 [2021-06-05 07:05:50,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:05:50,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:50,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:50,501 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:46 [2021-06-05 07:05:50,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:50,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:50,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:50,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 07:05:50,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423256675] [2021-06-05 07:05:50,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:05:50,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:50,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:05:50,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:05:50,559 INFO L87 Difference]: Start difference. First operand 1421 states and 4802 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 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) [2021-06-05 07:05:53,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:53,099 INFO L93 Difference]: Finished difference Result 2286 states and 7249 transitions. [2021-06-05 07:05:53,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:05:53,100 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 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 [2021-06-05 07:05:53,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:53,103 INFO L225 Difference]: With dead ends: 2286 [2021-06-05 07:05:53,103 INFO L226 Difference]: Without dead ends: 2249 [2021-06-05 07:05:53,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 2390.3ms TimeCoverageRelationStatistics Valid=447, Invalid=2415, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:05:53,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2249 states. [2021-06-05 07:05:53,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2249 to 1440. [2021-06-05 07:05:53,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1439 states have (on average 3.3794301598332175) internal successors, (4863), 1439 states have internal predecessors, (4863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:53,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 4863 transitions. [2021-06-05 07:05:53,123 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 4863 transitions. Word has length 26 [2021-06-05 07:05:53,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:53,123 INFO L482 AbstractCegarLoop]: Abstraction has 1440 states and 4863 transitions. [2021-06-05 07:05:53,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 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) [2021-06-05 07:05:53,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 4863 transitions. [2021-06-05 07:05:53,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:05:53,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:53,125 INFO L521 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] [2021-06-05 07:05:53,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 07:05:53,326 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:53,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:53,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1791604362, now seen corresponding path program 31 times [2021-06-05 07:05:53,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:53,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179298171] [2021-06-05 07:05:53,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:53,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:53,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:53,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:53,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179298171] [2021-06-05 07:05:53,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179298171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:53,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464610733] [2021-06-05 07:05:53,529 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 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 [2021-06-05 07:05:53,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:53,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 07:05:53,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:53,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:53,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:05:53,721 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 20 treesize of output 12 [2021-06-05 07:05:53,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:53,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:53,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:53,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 07:05:53,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:53,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464610733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:53,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:53,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 07:05:53,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246942534] [2021-06-05 07:05:53,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:05:53,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:53,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:05:53,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:05:53,747 INFO L87 Difference]: Start difference. First operand 1440 states and 4863 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-06-05 07:05:54,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:54,587 INFO L93 Difference]: Finished difference Result 2060 states and 6655 transitions. [2021-06-05 07:05:54,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:05:54,587 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 26 [2021-06-05 07:05:54,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:54,589 INFO L225 Difference]: With dead ends: 2060 [2021-06-05 07:05:54,589 INFO L226 Difference]: Without dead ends: 2045 [2021-06-05 07:05:54,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 815.2ms TimeCoverageRelationStatistics Valid=227, Invalid=765, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:05:54,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2021-06-05 07:05:54,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1446. [2021-06-05 07:05:54,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1445 states have (on average 3.382006920415225) internal successors, (4887), 1445 states have internal predecessors, (4887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:54,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 4887 transitions. [2021-06-05 07:05:54,607 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 4887 transitions. Word has length 26 [2021-06-05 07:05:54,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:54,607 INFO L482 AbstractCegarLoop]: Abstraction has 1446 states and 4887 transitions. [2021-06-05 07:05:54,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-06-05 07:05:54,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 4887 transitions. [2021-06-05 07:05:54,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:05:54,609 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:54,609 INFO L521 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] [2021-06-05 07:05:54,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:54,810 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:54,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:54,810 INFO L82 PathProgramCache]: Analyzing trace with hash 885830154, now seen corresponding path program 32 times [2021-06-05 07:05:54,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:54,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573889226] [2021-06-05 07:05:54,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:54,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:54,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:54,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:54,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573889226] [2021-06-05 07:05:54,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573889226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:54,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699924001] [2021-06-05 07:05:54,992 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 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 [2021-06-05 07:05:55,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:05:55,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:55,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:05:55,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:55,201 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:55,202 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 20 treesize of output 36 [2021-06-05 07:05:55,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:55,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:55,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 07:05:55,257 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:312 [2021-06-05 07:05:55,467 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-06-05 07:05:55,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:55,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699924001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:55,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:55,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 07:05:55,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3404554] [2021-06-05 07:05:55,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:05:55,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:55,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:05:55,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:05:55,689 INFO L87 Difference]: Start difference. First operand 1446 states and 4887 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) 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) [2021-06-05 07:05:56,788 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-06-05 07:05:56,931 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 38 [2021-06-05 07:05:57,072 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2021-06-05 07:05:57,413 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-06-05 07:05:57,600 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 38 [2021-06-05 07:05:58,241 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-06-05 07:05:58,436 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 26 [2021-06-05 07:05:58,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:58,519 INFO L93 Difference]: Finished difference Result 2667 states and 8418 transitions. [2021-06-05 07:05:58,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 07:05:58,519 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) 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 [2021-06-05 07:05:58,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:58,523 INFO L225 Difference]: With dead ends: 2667 [2021-06-05 07:05:58,523 INFO L226 Difference]: Without dead ends: 2629 [2021-06-05 07:05:58,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 2769.2ms TimeCoverageRelationStatistics Valid=444, Invalid=1908, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:05:58,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2629 states. [2021-06-05 07:05:58,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2629 to 1442. [2021-06-05 07:05:58,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.3809854267869537) internal successors, (4872), 1441 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:58,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4872 transitions. [2021-06-05 07:05:58,545 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4872 transitions. Word has length 26 [2021-06-05 07:05:58,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:58,545 INFO L482 AbstractCegarLoop]: Abstraction has 1442 states and 4872 transitions. [2021-06-05 07:05:58,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) 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) [2021-06-05 07:05:58,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4872 transitions. [2021-06-05 07:05:58,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:05:58,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:58,547 INFO L521 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] [2021-06-05 07:05:58,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 07:05:58,747 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:58,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:58,747 INFO L82 PathProgramCache]: Analyzing trace with hash 2122915566, now seen corresponding path program 45 times [2021-06-05 07:05:58,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:58,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429371151] [2021-06-05 07:05:58,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:58,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:59,016 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:59,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:59,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429371151] [2021-06-05 07:05:59,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429371151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:59,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6952207] [2021-06-05 07:05:59,017 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 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 [2021-06-05 07:05:59,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:05:59,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:59,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 07:05:59,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:59,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:59,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:59,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:59,281 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:59,281 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 [2021-06-05 07:05:59,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:05:59,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:59,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:59,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:46 [2021-06-05 07:05:59,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:59,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6952207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:59,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:59,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 07:05:59,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633550086] [2021-06-05 07:05:59,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:05:59,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:59,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:05:59,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:05:59,374 INFO L87 Difference]: Start difference. First operand 1442 states and 4872 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) [2021-06-05 07:06:00,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:00,882 INFO L93 Difference]: Finished difference Result 2363 states and 7703 transitions. [2021-06-05 07:06:00,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:06:00,882 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 [2021-06-05 07:06:00,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:00,886 INFO L225 Difference]: With dead ends: 2363 [2021-06-05 07:06:00,886 INFO L226 Difference]: Without dead ends: 2348 [2021-06-05 07:06:00,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 1406.6ms TimeCoverageRelationStatistics Valid=351, Invalid=1719, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:06:00,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2021-06-05 07:06:00,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 1449. [2021-06-05 07:06:00,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1448 states have (on average 3.382596685082873) internal successors, (4898), 1448 states have internal predecessors, (4898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:00,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 4898 transitions. [2021-06-05 07:06:00,917 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 4898 transitions. Word has length 26 [2021-06-05 07:06:00,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:00,917 INFO L482 AbstractCegarLoop]: Abstraction has 1449 states and 4898 transitions. [2021-06-05 07:06:00,917 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) [2021-06-05 07:06:00,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 4898 transitions. [2021-06-05 07:06:00,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:06:00,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:00,919 INFO L521 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] [2021-06-05 07:06:01,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:01,121 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:01,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:01,121 INFO L82 PathProgramCache]: Analyzing trace with hash -338403078, now seen corresponding path program 46 times [2021-06-05 07:06:01,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:01,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249569564] [2021-06-05 07:06:01,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:01,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:01,346 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:01,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:01,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249569564] [2021-06-05 07:06:01,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249569564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:01,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968886628] [2021-06-05 07:06:01,346 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 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 [2021-06-05 07:06:01,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:06:01,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:01,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:06:01,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:01,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:01,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:01,482 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:01,482 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 39 [2021-06-05 07:06:01,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:06:01,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:01,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:01,497 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-06-05 07:06:01,539 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:01,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968886628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:01,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:01,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 07:06:01,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360659667] [2021-06-05 07:06:01,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:06:01,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:01,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:06:01,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:06:01,540 INFO L87 Difference]: Start difference. First operand 1449 states and 4898 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-06-05 07:06:03,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:03,493 INFO L93 Difference]: Finished difference Result 3450 states and 10856 transitions. [2021-06-05 07:06:03,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 07:06:03,494 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 26 [2021-06-05 07:06:03,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:03,498 INFO L225 Difference]: With dead ends: 3450 [2021-06-05 07:06:03,498 INFO L226 Difference]: Without dead ends: 3393 [2021-06-05 07:06:03,499 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1722.1ms TimeCoverageRelationStatistics Valid=512, Invalid=2038, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:06:03,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3393 states. [2021-06-05 07:06:03,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3393 to 1615. [2021-06-05 07:06:03,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1615 states, 1614 states have (on average 3.4052044609665426) internal successors, (5496), 1614 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:03,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1615 states to 1615 states and 5496 transitions. [2021-06-05 07:06:03,538 INFO L78 Accepts]: Start accepts. Automaton has 1615 states and 5496 transitions. Word has length 26 [2021-06-05 07:06:03,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:03,538 INFO L482 AbstractCegarLoop]: Abstraction has 1615 states and 5496 transitions. [2021-06-05 07:06:03,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-06-05 07:06:03,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1615 states and 5496 transitions. [2021-06-05 07:06:03,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:06:03,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:03,540 INFO L521 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] [2021-06-05 07:06:03,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 07:06:03,745 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:03,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:03,745 INFO L82 PathProgramCache]: Analyzing trace with hash 2079051698, now seen corresponding path program 33 times [2021-06-05 07:06:03,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:03,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305894518] [2021-06-05 07:06:03,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:03,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:03,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:03,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305894518] [2021-06-05 07:06:03,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305894518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:03,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786393875] [2021-06-05 07:06:03,927 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 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 [2021-06-05 07:06:03,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:06:03,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:03,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:06:03,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:04,144 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:04,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20 treesize of output 28 [2021-06-05 07:06:04,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:04,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:04,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:04,167 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:75 [2021-06-05 07:06:04,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:04,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786393875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:04,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:04,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 07:06:04,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438381224] [2021-06-05 07:06:04,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:06:04,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:04,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:06:04,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:06:04,246 INFO L87 Difference]: Start difference. First operand 1615 states and 5496 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) 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) [2021-06-05 07:06:05,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:05,769 INFO L93 Difference]: Finished difference Result 2210 states and 7258 transitions. [2021-06-05 07:06:05,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:06:05,769 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) 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 [2021-06-05 07:06:05,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:05,772 INFO L225 Difference]: With dead ends: 2210 [2021-06-05 07:06:05,772 INFO L226 Difference]: Without dead ends: 2180 [2021-06-05 07:06:05,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1223.4ms TimeCoverageRelationStatistics Valid=284, Invalid=1522, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:06:05,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2180 states. [2021-06-05 07:06:05,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2180 to 1620. [2021-06-05 07:06:05,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1619 states have (on average 3.4021000617665225) internal successors, (5508), 1619 states have internal predecessors, (5508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:05,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 5508 transitions. [2021-06-05 07:06:05,792 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 5508 transitions. Word has length 26 [2021-06-05 07:06:05,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:05,792 INFO L482 AbstractCegarLoop]: Abstraction has 1620 states and 5508 transitions. [2021-06-05 07:06:05,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) 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) [2021-06-05 07:06:05,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 5508 transitions. [2021-06-05 07:06:05,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:06:05,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:05,794 INFO L521 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] [2021-06-05 07:06:05,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:05,995 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:05,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:05,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1795376066, now seen corresponding path program 34 times [2021-06-05 07:06:05,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:05,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385509720] [2021-06-05 07:06:05,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:05,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:06,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:06,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:06,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385509720] [2021-06-05 07:06:06,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385509720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:06,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134937407] [2021-06-05 07:06:06,189 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 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 [2021-06-05 07:06:06,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:06:06,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:06,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 07:06:06,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:06,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:06,370 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:06,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-06-05 07:06:06,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:06:06,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:06,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:06,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2021-06-05 07:06:06,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:06,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134937407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:06,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:06,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 07:06:06,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744368872] [2021-06-05 07:06:06,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:06:06,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:06,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:06:06,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:06:06,422 INFO L87 Difference]: Start difference. First operand 1620 states and 5508 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-06-05 07:06:07,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:07,131 INFO L93 Difference]: Finished difference Result 2187 states and 7261 transitions. [2021-06-05 07:06:07,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:06:07,131 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 26 [2021-06-05 07:06:07,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:07,134 INFO L225 Difference]: With dead ends: 2187 [2021-06-05 07:06:07,134 INFO L226 Difference]: Without dead ends: 2162 [2021-06-05 07:06:07,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 649.7ms TimeCoverageRelationStatistics Valid=238, Invalid=952, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:06:07,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2162 states. [2021-06-05 07:06:07,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2162 to 1623. [2021-06-05 07:06:07,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1622 states have (on average 3.401356350184957) internal successors, (5517), 1622 states have internal predecessors, (5517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:07,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 5517 transitions. [2021-06-05 07:06:07,154 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 5517 transitions. Word has length 26 [2021-06-05 07:06:07,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:07,154 INFO L482 AbstractCegarLoop]: Abstraction has 1623 states and 5517 transitions. [2021-06-05 07:06:07,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-06-05 07:06:07,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 5517 transitions. [2021-06-05 07:06:07,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:06:07,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:07,157 INFO L521 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] [2021-06-05 07:06:07,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:07,359 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:07,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:07,360 INFO L82 PathProgramCache]: Analyzing trace with hash 2031976096, now seen corresponding path program 35 times [2021-06-05 07:06:07,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:07,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45558477] [2021-06-05 07:06:07,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:07,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:07,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:07,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:07,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45558477] [2021-06-05 07:06:07,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45558477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:07,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082624412] [2021-06-05 07:06:07,537 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 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 [2021-06-05 07:06:07,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:06:07,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:07,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 07:06:07,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:07,776 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 07:06:07,777 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 56 [2021-06-05 07:06:07,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:07,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:07,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:07,792 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:19 [2021-06-05 07:06:07,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:07,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082624412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:07,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:07,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 07:06:07,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496178714] [2021-06-05 07:06:07,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:06:07,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:07,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:06:07,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:06:07,853 INFO L87 Difference]: Start difference. First operand 1623 states and 5517 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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) [2021-06-05 07:06:09,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:09,198 INFO L93 Difference]: Finished difference Result 2464 states and 8030 transitions. [2021-06-05 07:06:09,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:06:09,198 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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 [2021-06-05 07:06:09,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:09,221 INFO L225 Difference]: With dead ends: 2464 [2021-06-05 07:06:09,221 INFO L226 Difference]: Without dead ends: 2430 [2021-06-05 07:06:09,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1183.6ms TimeCoverageRelationStatistics Valid=357, Invalid=1535, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 07:06:09,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2430 states. [2021-06-05 07:06:09,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2430 to 1617. [2021-06-05 07:06:09,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1616 states have (on average 3.3991336633663365) internal successors, (5493), 1616 states have internal predecessors, (5493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:09,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 5493 transitions. [2021-06-05 07:06:09,243 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 5493 transitions. Word has length 26 [2021-06-05 07:06:09,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:09,243 INFO L482 AbstractCegarLoop]: Abstraction has 1617 states and 5493 transitions. [2021-06-05 07:06:09,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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) [2021-06-05 07:06:09,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 5493 transitions. [2021-06-05 07:06:09,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:06:09,245 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:09,245 INFO L521 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] [2021-06-05 07:06:09,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:09,460 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:09,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:09,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1102392532, now seen corresponding path program 47 times [2021-06-05 07:06:09,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:09,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464880507] [2021-06-05 07:06:09,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:09,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:09,757 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:09,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:09,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464880507] [2021-06-05 07:06:09,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464880507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:09,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788178926] [2021-06-05 07:06:09,757 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 [2021-06-05 07:06:09,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:06:09,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:09,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:06:09,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:09,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:09,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:09,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:06:09,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:06:09,910 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 21 treesize of output 11 [2021-06-05 07:06:09,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:09,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:09,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:09,917 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 07:06:09,931 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:09,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788178926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:09,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:09,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 07:06:09,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298333829] [2021-06-05 07:06:09,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:06:09,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:09,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:06:09,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:06:09,932 INFO L87 Difference]: Start difference. First operand 1617 states and 5493 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) 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) [2021-06-05 07:06:11,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:11,097 INFO L93 Difference]: Finished difference Result 2080 states and 6843 transitions. [2021-06-05 07:06:11,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:06:11,097 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) 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 26 [2021-06-05 07:06:11,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:11,100 INFO L225 Difference]: With dead ends: 2080 [2021-06-05 07:06:11,100 INFO L226 Difference]: Without dead ends: 2058 [2021-06-05 07:06:11,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1097.5ms TimeCoverageRelationStatistics Valid=299, Invalid=1183, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:06:11,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2058 states. [2021-06-05 07:06:11,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2058 to 1607. [2021-06-05 07:06:11,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1607 states, 1606 states have (on average 3.398505603985056) internal successors, (5458), 1606 states have internal predecessors, (5458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:11,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1607 states to 1607 states and 5458 transitions. [2021-06-05 07:06:11,119 INFO L78 Accepts]: Start accepts. Automaton has 1607 states and 5458 transitions. Word has length 26 [2021-06-05 07:06:11,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:11,119 INFO L482 AbstractCegarLoop]: Abstraction has 1607 states and 5458 transitions. [2021-06-05 07:06:11,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) 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) [2021-06-05 07:06:11,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1607 states and 5458 transitions. [2021-06-05 07:06:11,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:06:11,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:11,121 INFO L521 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] [2021-06-05 07:06:11,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:11,321 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:11,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:11,322 INFO L82 PathProgramCache]: Analyzing trace with hash 2027886398, now seen corresponding path program 48 times [2021-06-05 07:06:11,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:11,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938988240] [2021-06-05 07:06:11,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:11,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:11,609 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:11,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:11,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938988240] [2021-06-05 07:06:11,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938988240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:11,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077040660] [2021-06-05 07:06:11,610 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 [2021-06-05 07:06:11,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:06:11,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:11,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:06:11,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:11,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:06:11,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:11,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:11,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:06:11,788 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 25 treesize of output 13 [2021-06-05 07:06:11,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:11,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:11,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:11,795 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 07:06:11,817 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:11,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077040660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:11,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:11,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 07:06:11,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718536969] [2021-06-05 07:06:11,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:06:11,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:11,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:06:11,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:06:11,818 INFO L87 Difference]: Start difference. First operand 1607 states and 5458 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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) [2021-06-05 07:06:13,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:13,405 INFO L93 Difference]: Finished difference Result 2207 states and 7294 transitions. [2021-06-05 07:06:13,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:06:13,405 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 [2021-06-05 07:06:13,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:13,408 INFO L225 Difference]: With dead ends: 2207 [2021-06-05 07:06:13,408 INFO L226 Difference]: Without dead ends: 2192 [2021-06-05 07:06:13,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1518.9ms TimeCoverageRelationStatistics Valid=358, Invalid=1534, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 07:06:13,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2021-06-05 07:06:13,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 1607. [2021-06-05 07:06:13,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1607 states, 1606 states have (on average 3.398505603985056) internal successors, (5458), 1606 states have internal predecessors, (5458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:13,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1607 states to 1607 states and 5458 transitions. [2021-06-05 07:06:13,430 INFO L78 Accepts]: Start accepts. Automaton has 1607 states and 5458 transitions. Word has length 26 [2021-06-05 07:06:13,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:13,430 INFO L482 AbstractCegarLoop]: Abstraction has 1607 states and 5458 transitions. [2021-06-05 07:06:13,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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) [2021-06-05 07:06:13,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1607 states and 5458 transitions. [2021-06-05 07:06:13,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:06:13,433 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:13,433 INFO L521 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] [2021-06-05 07:06:13,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 07:06:13,633 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:13,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:13,633 INFO L82 PathProgramCache]: Analyzing trace with hash 849981858, now seen corresponding path program 49 times [2021-06-05 07:06:13,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:13,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664371949] [2021-06-05 07:06:13,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:13,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:13,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:13,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:13,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664371949] [2021-06-05 07:06:13,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664371949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:13,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520625105] [2021-06-05 07:06:13,880 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 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 [2021-06-05 07:06:13,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:13,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:06:13,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:14,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:06:14,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:14,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:06:14,036 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 21 treesize of output 11 [2021-06-05 07:06:14,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:14,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:14,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:14,042 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 07:06:14,063 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:14,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520625105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:14,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:14,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 07:06:14,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114967508] [2021-06-05 07:06:14,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:06:14,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:14,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:06:14,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:06:14,064 INFO L87 Difference]: Start difference. First operand 1607 states and 5458 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-06-05 07:06:15,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:15,604 INFO L93 Difference]: Finished difference Result 2722 states and 8796 transitions. [2021-06-05 07:06:15,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:06:15,604 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 26 [2021-06-05 07:06:15,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:15,608 INFO L225 Difference]: With dead ends: 2722 [2021-06-05 07:06:15,608 INFO L226 Difference]: Without dead ends: 2686 [2021-06-05 07:06:15,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1411.3ms TimeCoverageRelationStatistics Valid=386, Invalid=1870, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:06:15,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2686 states. [2021-06-05 07:06:15,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2686 to 1677. [2021-06-05 07:06:15,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1677 states, 1676 states have (on average 3.389021479713604) internal successors, (5680), 1676 states have internal predecessors, (5680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:15,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 5680 transitions. [2021-06-05 07:06:15,633 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 5680 transitions. Word has length 26 [2021-06-05 07:06:15,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:15,633 INFO L482 AbstractCegarLoop]: Abstraction has 1677 states and 5680 transitions. [2021-06-05 07:06:15,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-06-05 07:06:15,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 5680 transitions. [2021-06-05 07:06:15,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:06:15,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:15,635 INFO L521 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] [2021-06-05 07:06:15,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 07:06:15,836 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:15,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:15,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1611336786, now seen corresponding path program 50 times [2021-06-05 07:06:15,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:15,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829497935] [2021-06-05 07:06:15,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:15,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:16,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:16,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:16,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829497935] [2021-06-05 07:06:16,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829497935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:16,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549051873] [2021-06-05 07:06:16,092 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 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 [2021-06-05 07:06:16,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:06:16,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:16,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:06:16,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:16,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:16,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:16,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:16,253 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:16,253 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 43 [2021-06-05 07:06:16,258 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 07:06:16,272 INFO L628 ElimStorePlain]: treesize reduction 20, result has 47.4 percent of original size [2021-06-05 07:06:16,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:16,273 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:18 [2021-06-05 07:06:16,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:16,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549051873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:16,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:16,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2021-06-05 07:06:16,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894772630] [2021-06-05 07:06:16,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:06:16,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:16,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:06:16,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:06:16,318 INFO L87 Difference]: Start difference. First operand 1677 states and 5680 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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) [2021-06-05 07:06:20,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:20,365 INFO L93 Difference]: Finished difference Result 3350 states and 10511 transitions. [2021-06-05 07:06:20,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 07:06:20,365 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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 [2021-06-05 07:06:20,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:20,369 INFO L225 Difference]: With dead ends: 3350 [2021-06-05 07:06:20,369 INFO L226 Difference]: Without dead ends: 3286 [2021-06-05 07:06:20,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2283 ImplicationChecksByTransitivity, 3559.3ms TimeCoverageRelationStatistics Valid=1163, Invalid=5317, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 07:06:20,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3286 states. [2021-06-05 07:06:20,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3286 to 1694. [2021-06-05 07:06:20,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1694 states, 1693 states have (on average 3.375073833431778) internal successors, (5714), 1693 states have internal predecessors, (5714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:20,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1694 states to 1694 states and 5714 transitions. [2021-06-05 07:06:20,397 INFO L78 Accepts]: Start accepts. Automaton has 1694 states and 5714 transitions. Word has length 26 [2021-06-05 07:06:20,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:20,397 INFO L482 AbstractCegarLoop]: Abstraction has 1694 states and 5714 transitions. [2021-06-05 07:06:20,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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) [2021-06-05 07:06:20,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1694 states and 5714 transitions. [2021-06-05 07:06:20,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:06:20,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:20,399 INFO L521 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] [2021-06-05 07:06:20,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 07:06:20,599 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:20,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:20,600 INFO L82 PathProgramCache]: Analyzing trace with hash -696255298, now seen corresponding path program 51 times [2021-06-05 07:06:20,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:20,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294840755] [2021-06-05 07:06:20,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:20,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:20,893 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:20,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:20,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294840755] [2021-06-05 07:06:20,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294840755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:20,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230411579] [2021-06-05 07:06:20,894 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 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 [2021-06-05 07:06:20,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:06:20,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:20,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:06:20,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:21,163 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:21,163 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 19 treesize of output 51 [2021-06-05 07:06:21,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:06:21,340 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2021-06-05 07:06:21,340 INFO L628 ElimStorePlain]: treesize reduction 81, result has 51.5 percent of original size [2021-06-05 07:06:21,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:21,356 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:273 [2021-06-05 07:06:21,492 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-06-05 07:06:21,661 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-06-05 07:06:21,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:21,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230411579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:21,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:21,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 07:06:21,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786157733] [2021-06-05 07:06:21,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:06:21,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:21,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:06:21,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:06:21,756 INFO L87 Difference]: Start difference. First operand 1694 states and 5714 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) [2021-06-05 07:06:22,720 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-06-05 07:06:23,114 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2021-06-05 07:06:23,381 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-06-05 07:06:23,774 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2021-06-05 07:06:24,445 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-06-05 07:06:24,645 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 40 [2021-06-05 07:06:24,795 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 43 [2021-06-05 07:06:24,970 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-06-05 07:06:25,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:25,064 INFO L93 Difference]: Finished difference Result 2842 states and 9155 transitions. [2021-06-05 07:06:25,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 07:06:25,064 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 [2021-06-05 07:06:25,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:25,068 INFO L225 Difference]: With dead ends: 2842 [2021-06-05 07:06:25,068 INFO L226 Difference]: Without dead ends: 2797 [2021-06-05 07:06:25,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 3308.9ms TimeCoverageRelationStatistics Valid=552, Invalid=2640, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 07:06:25,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2797 states. [2021-06-05 07:06:25,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2797 to 1705. [2021-06-05 07:06:25,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1704 states have (on average 3.380868544600939) internal successors, (5761), 1704 states have internal predecessors, (5761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:25,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 5761 transitions. [2021-06-05 07:06:25,091 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 5761 transitions. Word has length 26 [2021-06-05 07:06:25,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:25,091 INFO L482 AbstractCegarLoop]: Abstraction has 1705 states and 5761 transitions. [2021-06-05 07:06:25,091 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) [2021-06-05 07:06:25,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 5761 transitions. [2021-06-05 07:06:25,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:06:25,093 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:25,093 INFO L521 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] [2021-06-05 07:06:25,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:25,297 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:25,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:25,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1813857782, now seen corresponding path program 52 times [2021-06-05 07:06:25,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:25,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932245786] [2021-06-05 07:06:25,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:25,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:25,509 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:25,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:25,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932245786] [2021-06-05 07:06:25,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932245786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:25,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721647757] [2021-06-05 07:06:25,510 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 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 [2021-06-05 07:06:25,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:06:25,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:25,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:06:25,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:25,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:06:25,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:25,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:25,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:06:25,706 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 [2021-06-05 07:06:25,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:25,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:25,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:25,713 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:10 [2021-06-05 07:06:25,731 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:25,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721647757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:25,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:25,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 07:06:25,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705244743] [2021-06-05 07:06:25,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:06:25,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:25,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:06:25,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:06:25,732 INFO L87 Difference]: Start difference. First operand 1705 states and 5761 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-06-05 07:06:27,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:27,284 INFO L93 Difference]: Finished difference Result 2158 states and 7106 transitions. [2021-06-05 07:06:27,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:06:27,284 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 [2021-06-05 07:06:27,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:27,287 INFO L225 Difference]: With dead ends: 2158 [2021-06-05 07:06:27,287 INFO L226 Difference]: Without dead ends: 2143 [2021-06-05 07:06:27,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1420.9ms TimeCoverageRelationStatistics Valid=288, Invalid=1352, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:06:27,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2143 states. [2021-06-05 07:06:27,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2143 to 1709. [2021-06-05 07:06:27,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1709 states, 1708 states have (on average 3.3811475409836067) internal successors, (5775), 1708 states have internal predecessors, (5775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:27,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1709 states to 1709 states and 5775 transitions. [2021-06-05 07:06:27,309 INFO L78 Accepts]: Start accepts. Automaton has 1709 states and 5775 transitions. Word has length 26 [2021-06-05 07:06:27,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:27,309 INFO L482 AbstractCegarLoop]: Abstraction has 1709 states and 5775 transitions. [2021-06-05 07:06:27,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-06-05 07:06:27,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1709 states and 5775 transitions. [2021-06-05 07:06:27,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:06:27,311 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:27,311 INFO L521 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] [2021-06-05 07:06:27,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-05 07:06:27,512 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:27,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:27,512 INFO L82 PathProgramCache]: Analyzing trace with hash -782211534, now seen corresponding path program 53 times [2021-06-05 07:06:27,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:27,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258048094] [2021-06-05 07:06:27,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:27,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:27,774 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:27,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:27,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258048094] [2021-06-05 07:06:27,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258048094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:27,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570058118] [2021-06-05 07:06:27,775 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 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 [2021-06-05 07:06:27,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 07:06:27,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:27,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 07:06:27,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:27,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:27,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:27,991 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:27,991 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 39 [2021-06-05 07:06:27,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:06:28,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:28,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:28,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 07:06:28,078 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:28,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570058118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:28,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:28,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 07:06:28,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955805231] [2021-06-05 07:06:28,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:06:28,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:28,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:06:28,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:06:28,079 INFO L87 Difference]: Start difference. First operand 1709 states and 5775 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 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) [2021-06-05 07:06:29,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:29,318 INFO L93 Difference]: Finished difference Result 2441 states and 8075 transitions. [2021-06-05 07:06:29,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 07:06:29,318 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 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 [2021-06-05 07:06:29,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:29,321 INFO L225 Difference]: With dead ends: 2441 [2021-06-05 07:06:29,322 INFO L226 Difference]: Without dead ends: 2426 [2021-06-05 07:06:29,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 1107.4ms TimeCoverageRelationStatistics Valid=236, Invalid=1246, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:06:29,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2021-06-05 07:06:29,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 1709. [2021-06-05 07:06:29,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1709 states, 1708 states have (on average 3.3811475409836067) internal successors, (5775), 1708 states have internal predecessors, (5775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:29,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1709 states to 1709 states and 5775 transitions. [2021-06-05 07:06:29,344 INFO L78 Accepts]: Start accepts. Automaton has 1709 states and 5775 transitions. Word has length 26 [2021-06-05 07:06:29,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:29,345 INFO L482 AbstractCegarLoop]: Abstraction has 1709 states and 5775 transitions. [2021-06-05 07:06:29,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 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) [2021-06-05 07:06:29,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1709 states and 5775 transitions. [2021-06-05 07:06:29,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:06:29,347 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:29,347 INFO L521 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] [2021-06-05 07:06:29,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 07:06:29,547 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:29,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:29,547 INFO L82 PathProgramCache]: Analyzing trace with hash 370367166, now seen corresponding path program 54 times [2021-06-05 07:06:29,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:29,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766883780] [2021-06-05 07:06:29,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:29,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:29,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:29,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:29,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766883780] [2021-06-05 07:06:29,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766883780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:29,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204855672] [2021-06-05 07:06:29,841 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 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 [2021-06-05 07:06:29,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:06:29,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:29,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:06:29,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:29,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:06:29,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:30,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:06:30,001 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 07:06:30,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:30,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:30,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:30,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 07:06:30,032 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:30,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204855672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:30,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:30,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 07:06:30,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819031762] [2021-06-05 07:06:30,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:06:30,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:30,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:06:30,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:06:30,033 INFO L87 Difference]: Start difference. First operand 1709 states and 5775 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-06-05 07:06:30,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:30,829 INFO L93 Difference]: Finished difference Result 2137 states and 7029 transitions. [2021-06-05 07:06:30,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:06:30,830 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 [2021-06-05 07:06:30,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:30,833 INFO L225 Difference]: With dead ends: 2137 [2021-06-05 07:06:30,833 INFO L226 Difference]: Without dead ends: 2118 [2021-06-05 07:06:30,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 908.7ms TimeCoverageRelationStatistics Valid=224, Invalid=898, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 07:06:30,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2118 states. [2021-06-05 07:06:30,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2118 to 1703. [2021-06-05 07:06:30,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1702 states have (on average 3.380728554641598) internal successors, (5754), 1702 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:30,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 5754 transitions. [2021-06-05 07:06:30,855 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 5754 transitions. Word has length 26 [2021-06-05 07:06:30,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:30,855 INFO L482 AbstractCegarLoop]: Abstraction has 1703 states and 5754 transitions. [2021-06-05 07:06:30,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-06-05 07:06:30,855 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 5754 transitions. [2021-06-05 07:06:30,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:06:30,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:30,857 INFO L521 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] [2021-06-05 07:06:31,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:31,057 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:31,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:31,058 INFO L82 PathProgramCache]: Analyzing trace with hash 376151132, now seen corresponding path program 55 times [2021-06-05 07:06:31,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:31,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880161952] [2021-06-05 07:06:31,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:31,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:31,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:31,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:31,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880161952] [2021-06-05 07:06:31,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880161952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:31,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010133809] [2021-06-05 07:06:31,338 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 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 [2021-06-05 07:06:31,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:31,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:06:31,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:31,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:31,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:31,496 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:31,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 07:06:31,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:06:31,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:31,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:31,511 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:18 [2021-06-05 07:06:31,552 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:31,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010133809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:31,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:31,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 07:06:31,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510926932] [2021-06-05 07:06:31,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:06:31,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:31,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:06:31,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:06:31,553 INFO L87 Difference]: Start difference. First operand 1703 states and 5754 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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) [2021-06-05 07:06:33,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:33,533 INFO L93 Difference]: Finished difference Result 2951 states and 9376 transitions. [2021-06-05 07:06:33,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:06:33,533 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 26 [2021-06-05 07:06:33,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:33,538 INFO L225 Difference]: With dead ends: 2951 [2021-06-05 07:06:33,538 INFO L226 Difference]: Without dead ends: 2932 [2021-06-05 07:06:33,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1846.7ms TimeCoverageRelationStatistics Valid=543, Invalid=1713, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:06:33,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2932 states. [2021-06-05 07:06:33,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2932 to 1697. [2021-06-05 07:06:33,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1696 states have (on average 3.3767688679245285) internal successors, (5727), 1696 states have internal predecessors, (5727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:33,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 5727 transitions. [2021-06-05 07:06:33,567 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 5727 transitions. Word has length 26 [2021-06-05 07:06:33,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:33,567 INFO L482 AbstractCegarLoop]: Abstraction has 1697 states and 5727 transitions. [2021-06-05 07:06:33,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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) [2021-06-05 07:06:33,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 5727 transitions. [2021-06-05 07:06:33,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:06:33,569 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:33,569 INFO L521 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] [2021-06-05 07:06:33,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:33,769 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:33,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:33,770 INFO L82 PathProgramCache]: Analyzing trace with hash 871796194, now seen corresponding path program 36 times [2021-06-05 07:06:33,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:33,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404691141] [2021-06-05 07:06:33,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:33,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:33,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:33,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:33,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404691141] [2021-06-05 07:06:33,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404691141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:33,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547519194] [2021-06-05 07:06:33,888 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 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 [2021-06-05 07:06:33,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:06:33,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:33,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 07:06:33,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:34,091 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 07:06:34,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 64 [2021-06-05 07:06:34,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:34,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:34,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:34,107 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:73, output treesize:49 [2021-06-05 07:06:34,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:34,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547519194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:34,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:34,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 07:06:34,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227060973] [2021-06-05 07:06:34,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:06:34,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:34,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:06:34,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:06:34,149 INFO L87 Difference]: Start difference. First operand 1697 states and 5727 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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) [2021-06-05 07:06:35,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:35,545 INFO L93 Difference]: Finished difference Result 2361 states and 7668 transitions. [2021-06-05 07:06:35,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:06:35,545 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 [2021-06-05 07:06:35,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:35,548 INFO L225 Difference]: With dead ends: 2361 [2021-06-05 07:06:35,549 INFO L226 Difference]: Without dead ends: 2331 [2021-06-05 07:06:35,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1038.2ms TimeCoverageRelationStatistics Valid=257, Invalid=1723, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 07:06:35,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-06-05 07:06:35,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 1708. [2021-06-05 07:06:35,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 3.3807850029291155) internal successors, (5771), 1707 states have internal predecessors, (5771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:35,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 5771 transitions. [2021-06-05 07:06:35,576 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 5771 transitions. Word has length 26 [2021-06-05 07:06:35,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:35,576 INFO L482 AbstractCegarLoop]: Abstraction has 1708 states and 5771 transitions. [2021-06-05 07:06:35,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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) [2021-06-05 07:06:35,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 5771 transitions. [2021-06-05 07:06:35,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:06:35,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:35,579 INFO L521 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] [2021-06-05 07:06:35,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 07:06:35,785 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:35,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:35,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1644457752, now seen corresponding path program 37 times [2021-06-05 07:06:35,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:35,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310867407] [2021-06-05 07:06:35,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:35,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:35,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:35,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:35,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310867407] [2021-06-05 07:06:35,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310867407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:35,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817330157] [2021-06-05 07:06:35,913 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 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 [2021-06-05 07:06:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:35,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:06:35,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:36,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:36,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:36,094 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:36,094 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 35 treesize of output 31 [2021-06-05 07:06:36,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:06:36,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:36,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:36,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:22 [2021-06-05 07:06:36,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:36,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817330157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:36,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:36,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 07:06:36,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846835053] [2021-06-05 07:06:36,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:06:36,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:36,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:06:36,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:06:36,151 INFO L87 Difference]: Start difference. First operand 1708 states and 5771 transitions. Second operand has 18 states, 18 states have (on average 2.5) 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) [2021-06-05 07:06:37,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:37,017 INFO L93 Difference]: Finished difference Result 2199 states and 7281 transitions. [2021-06-05 07:06:37,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 07:06:37,017 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) 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 [2021-06-05 07:06:37,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:37,020 INFO L225 Difference]: With dead ends: 2199 [2021-06-05 07:06:37,021 INFO L226 Difference]: Without dead ends: 2184 [2021-06-05 07:06:37,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 744.0ms TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:06:37,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2021-06-05 07:06:37,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 1697. [2021-06-05 07:06:37,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1696 states have (on average 3.3838443396226414) internal successors, (5739), 1696 states have internal predecessors, (5739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:37,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 5739 transitions. [2021-06-05 07:06:37,051 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 5739 transitions. Word has length 26 [2021-06-05 07:06:37,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:37,051 INFO L482 AbstractCegarLoop]: Abstraction has 1697 states and 5739 transitions. [2021-06-05 07:06:37,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) 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) [2021-06-05 07:06:37,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 5739 transitions. [2021-06-05 07:06:37,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:06:37,053 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:37,053 INFO L521 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] [2021-06-05 07:06:37,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:37,253 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:37,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:37,254 INFO L82 PathProgramCache]: Analyzing trace with hash 224636922, now seen corresponding path program 38 times [2021-06-05 07:06:37,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:37,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693235881] [2021-06-05 07:06:37,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:37,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:37,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:37,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:37,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693235881] [2021-06-05 07:06:37,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693235881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:37,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910103786] [2021-06-05 07:06:37,376 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 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 [2021-06-05 07:06:37,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:06:37,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:37,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:06:37,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:37,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:06:37,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:37,603 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 20 treesize of output 12 [2021-06-05 07:06:37,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:37,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:37,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:37,611 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-06-05 07:06:37,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:37,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910103786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:37,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:37,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 07:06:37,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550611301] [2021-06-05 07:06:37,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:06:37,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:37,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:06:37,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:06:37,630 INFO L87 Difference]: Start difference. First operand 1697 states and 5739 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) 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) [2021-06-05 07:06:38,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:38,242 INFO L93 Difference]: Finished difference Result 2365 states and 7781 transitions. [2021-06-05 07:06:38,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 07:06:38,246 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) 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 [2021-06-05 07:06:38,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:38,250 INFO L225 Difference]: With dead ends: 2365 [2021-06-05 07:06:38,250 INFO L226 Difference]: Without dead ends: 2350 [2021-06-05 07:06:38,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 570.2ms TimeCoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2021-06-05 07:06:38,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2021-06-05 07:06:38,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 1689. [2021-06-05 07:06:38,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1689 states, 1688 states have (on average 3.382701421800948) internal successors, (5710), 1688 states have internal predecessors, (5710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:38,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1689 states to 1689 states and 5710 transitions. [2021-06-05 07:06:38,272 INFO L78 Accepts]: Start accepts. Automaton has 1689 states and 5710 transitions. Word has length 26 [2021-06-05 07:06:38,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:38,272 INFO L482 AbstractCegarLoop]: Abstraction has 1689 states and 5710 transitions. [2021-06-05 07:06:38,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) 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) [2021-06-05 07:06:38,272 INFO L276 IsEmpty]: Start isEmpty. Operand 1689 states and 5710 transitions. [2021-06-05 07:06:38,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:06:38,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:38,274 INFO L521 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] [2021-06-05 07:06:38,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:38,474 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:38,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:38,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1034369354, now seen corresponding path program 39 times [2021-06-05 07:06:38,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:38,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590953673] [2021-06-05 07:06:38,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:38,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:38,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:38,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:38,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590953673] [2021-06-05 07:06:38,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590953673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:38,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730305766] [2021-06-05 07:06:38,607 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 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 [2021-06-05 07:06:38,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:06:38,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:38,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 07:06:38,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:38,773 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 07:06:38,774 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-06-05 07:06:38,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:38,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:38,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:38,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:21 [2021-06-05 07:06:38,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:38,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730305766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:38,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:38,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 07:06:38,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231075383] [2021-06-05 07:06:38,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:06:38,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:38,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:06:38,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:06:38,831 INFO L87 Difference]: Start difference. First operand 1689 states and 5710 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-06-05 07:06:39,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:39,542 INFO L93 Difference]: Finished difference Result 2545 states and 8378 transitions. [2021-06-05 07:06:39,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 07:06:39,542 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 26 [2021-06-05 07:06:39,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:39,545 INFO L225 Difference]: With dead ends: 2545 [2021-06-05 07:06:39,545 INFO L226 Difference]: Without dead ends: 2530 [2021-06-05 07:06:39,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 689.2ms TimeCoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:06:39,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-06-05 07:06:39,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 1683. [2021-06-05 07:06:39,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 3.3787158145065397) internal successors, (5683), 1682 states have internal predecessors, (5683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:39,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5683 transitions. [2021-06-05 07:06:39,568 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5683 transitions. Word has length 26 [2021-06-05 07:06:39,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:39,569 INFO L482 AbstractCegarLoop]: Abstraction has 1683 states and 5683 transitions. [2021-06-05 07:06:39,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-06-05 07:06:39,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5683 transitions. [2021-06-05 07:06:39,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:06:39,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:39,571 INFO L521 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] [2021-06-05 07:06:39,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:39,771 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:39,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:39,771 INFO L82 PathProgramCache]: Analyzing trace with hash 663462910, now seen corresponding path program 40 times [2021-06-05 07:06:39,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:39,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653836784] [2021-06-05 07:06:39,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:39,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:39,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:39,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:39,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653836784] [2021-06-05 07:06:39,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653836784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:39,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671342025] [2021-06-05 07:06:39,933 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 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 [2021-06-05 07:06:39,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:06:39,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:39,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:06:39,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:40,123 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-06-05 07:06:40,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 49 [2021-06-05 07:06:40,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:40,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:40,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:40,130 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:5 [2021-06-05 07:06:40,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:40,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671342025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:40,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:40,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 07:06:40,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478924535] [2021-06-05 07:06:40,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:06:40,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:40,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:06:40,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:06:40,145 INFO L87 Difference]: Start difference. First operand 1683 states and 5683 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 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) [2021-06-05 07:06:40,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:40,760 INFO L93 Difference]: Finished difference Result 2243 states and 7363 transitions. [2021-06-05 07:06:40,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 07:06:40,761 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 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 [2021-06-05 07:06:40,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:40,764 INFO L225 Difference]: With dead ends: 2243 [2021-06-05 07:06:40,764 INFO L226 Difference]: Without dead ends: 2218 [2021-06-05 07:06:40,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 604.0ms TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2021-06-05 07:06:40,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2218 states. [2021-06-05 07:06:40,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2218 to 1692. [2021-06-05 07:06:40,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1691 states have (on average 3.3820224719101124) internal successors, (5719), 1691 states have internal predecessors, (5719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:40,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 5719 transitions. [2021-06-05 07:06:40,784 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 5719 transitions. Word has length 26 [2021-06-05 07:06:40,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:40,784 INFO L482 AbstractCegarLoop]: Abstraction has 1692 states and 5719 transitions. [2021-06-05 07:06:40,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 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) [2021-06-05 07:06:40,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 5719 transitions. [2021-06-05 07:06:40,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:06:40,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:40,786 INFO L521 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] [2021-06-05 07:06:41,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-05 07:06:41,001 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:41,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:41,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1571862210, now seen corresponding path program 41 times [2021-06-05 07:06:41,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:41,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376836594] [2021-06-05 07:06:41,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:41,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:41,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:41,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:41,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376836594] [2021-06-05 07:06:41,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376836594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:41,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491077413] [2021-06-05 07:06:41,152 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 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 [2021-06-05 07:06:41,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:06:41,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:41,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:06:41,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:41,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:41,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:41,329 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 20 treesize of output 20 [2021-06-05 07:06:41,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:06:41,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:41,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:41,339 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2021-06-05 07:06:41,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:41,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491077413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:41,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:41,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 07:06:41,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355693715] [2021-06-05 07:06:41,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:06:41,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:41,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:06:41,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:06:41,380 INFO L87 Difference]: Start difference. First operand 1692 states and 5719 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-06-05 07:06:41,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:41,800 INFO L93 Difference]: Finished difference Result 2410 states and 7909 transitions. [2021-06-05 07:06:41,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:06:41,800 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 26 [2021-06-05 07:06:41,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:41,803 INFO L225 Difference]: With dead ends: 2410 [2021-06-05 07:06:41,803 INFO L226 Difference]: Without dead ends: 2385 [2021-06-05 07:06:41,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 455.4ms TimeCoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:06:41,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2385 states. [2021-06-05 07:06:41,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2385 to 1674. [2021-06-05 07:06:41,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 3.3807531380753137) internal successors, (5656), 1673 states have internal predecessors, (5656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:41,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 5656 transitions. [2021-06-05 07:06:41,830 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 5656 transitions. Word has length 26 [2021-06-05 07:06:41,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:41,830 INFO L482 AbstractCegarLoop]: Abstraction has 1674 states and 5656 transitions. [2021-06-05 07:06:41,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-06-05 07:06:41,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 5656 transitions. [2021-06-05 07:06:41,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:06:41,833 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:41,833 INFO L521 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] [2021-06-05 07:06:42,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-06-05 07:06:42,037 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:42,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:42,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1247883966, now seen corresponding path program 42 times [2021-06-05 07:06:42,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:42,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731956287] [2021-06-05 07:06:42,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:42,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:42,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:42,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:42,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731956287] [2021-06-05 07:06:42,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731956287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:42,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477907317] [2021-06-05 07:06:42,156 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 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 [2021-06-05 07:06:42,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:06:42,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:42,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 07:06:42,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:42,345 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 07:06:42,345 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 64 [2021-06-05 07:06:42,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:42,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:42,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:42,367 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:78, output treesize:77 [2021-06-05 07:06:42,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:42,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477907317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:42,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:42,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 07:06:42,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912589268] [2021-06-05 07:06:42,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:06:42,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:42,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:06:42,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:06:42,475 INFO L87 Difference]: Start difference. First operand 1674 states and 5656 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 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) [2021-06-05 07:06:43,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:43,531 INFO L93 Difference]: Finished difference Result 2335 states and 7668 transitions. [2021-06-05 07:06:43,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:06:43,531 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 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 [2021-06-05 07:06:43,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:43,535 INFO L225 Difference]: With dead ends: 2335 [2021-06-05 07:06:43,535 INFO L226 Difference]: Without dead ends: 2310 [2021-06-05 07:06:43,535 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 757.6ms TimeCoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:06:43,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2021-06-05 07:06:43,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 1662. [2021-06-05 07:06:43,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 3.3798916315472605) internal successors, (5614), 1661 states have internal predecessors, (5614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:43,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 5614 transitions. [2021-06-05 07:06:43,556 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 5614 transitions. Word has length 26 [2021-06-05 07:06:43,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:43,556 INFO L482 AbstractCegarLoop]: Abstraction has 1662 states and 5614 transitions. [2021-06-05 07:06:43,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 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) [2021-06-05 07:06:43,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 5614 transitions. [2021-06-05 07:06:43,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:06:43,558 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:43,558 INFO L521 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] [2021-06-05 07:06:43,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-05 07:06:43,758 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:43,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:43,759 INFO L82 PathProgramCache]: Analyzing trace with hash 518793590, now seen corresponding path program 43 times [2021-06-05 07:06:43,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:43,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153077569] [2021-06-05 07:06:43,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:43,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:43,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:43,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:43,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153077569] [2021-06-05 07:06:43,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153077569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:43,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975906866] [2021-06-05 07:06:43,896 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 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 [2021-06-05 07:06:43,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:43,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:06:43,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:44,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:44,091 INFO L354 Elim1Store]: treesize reduction 33, result has 26.7 percent of original size [2021-06-05 07:06:44,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 52 [2021-06-05 07:06:44,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:44,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:44,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:44,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:22 [2021-06-05 07:06:44,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:44,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975906866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:44,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:44,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 07:06:44,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282649989] [2021-06-05 07:06:44,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:06:44,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:44,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:06:44,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:06:44,141 INFO L87 Difference]: Start difference. First operand 1662 states and 5614 transitions. Second operand has 18 states, 18 states have (on average 2.5) 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) [2021-06-05 07:06:44,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:44,863 INFO L93 Difference]: Finished difference Result 2261 states and 7456 transitions. [2021-06-05 07:06:44,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:06:44,863 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) 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 [2021-06-05 07:06:44,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:44,866 INFO L225 Difference]: With dead ends: 2261 [2021-06-05 07:06:44,866 INFO L226 Difference]: Without dead ends: 2242 [2021-06-05 07:06:44,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 678.1ms TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:06:44,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2021-06-05 07:06:44,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 1649. [2021-06-05 07:06:44,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1648 states have (on average 3.3780339805825244) internal successors, (5567), 1648 states have internal predecessors, (5567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:44,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 5567 transitions. [2021-06-05 07:06:44,888 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 5567 transitions. Word has length 26 [2021-06-05 07:06:44,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:44,888 INFO L482 AbstractCegarLoop]: Abstraction has 1649 states and 5567 transitions. [2021-06-05 07:06:44,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) 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) [2021-06-05 07:06:44,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 5567 transitions. [2021-06-05 07:06:44,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:06:44,890 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:44,890 INFO L521 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] [2021-06-05 07:06:45,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:45,091 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:45,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:45,091 INFO L82 PathProgramCache]: Analyzing trace with hash 305289786, now seen corresponding path program 44 times [2021-06-05 07:06:45,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:45,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467345768] [2021-06-05 07:06:45,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:45,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:45,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:45,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:45,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467345768] [2021-06-05 07:06:45,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467345768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:45,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835956204] [2021-06-05 07:06:45,234 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 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 [2021-06-05 07:06:45,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:06:45,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:45,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:06:45,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:45,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:45,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:06:45,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 07:06:45,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:45,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:45,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:45,445 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 07:06:45,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:45,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835956204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:45,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:45,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 07:06:45,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585590272] [2021-06-05 07:06:45,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:06:45,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:45,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:06:45,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:06:45,464 INFO L87 Difference]: Start difference. First operand 1649 states and 5567 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 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) [2021-06-05 07:06:46,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:46,004 INFO L93 Difference]: Finished difference Result 2219 states and 7297 transitions. [2021-06-05 07:06:46,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 07:06:46,005 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 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 [2021-06-05 07:06:46,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:46,008 INFO L225 Difference]: With dead ends: 2219 [2021-06-05 07:06:46,008 INFO L226 Difference]: Without dead ends: 2204 [2021-06-05 07:06:46,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 568.6ms TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2021-06-05 07:06:46,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2021-06-05 07:06:46,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 1700. [2021-06-05 07:06:46,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1699 states have (on average 3.3737492642731017) internal successors, (5732), 1699 states have internal predecessors, (5732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:46,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 5732 transitions. [2021-06-05 07:06:46,030 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 5732 transitions. Word has length 26 [2021-06-05 07:06:46,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:46,030 INFO L482 AbstractCegarLoop]: Abstraction has 1700 states and 5732 transitions. [2021-06-05 07:06:46,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 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) [2021-06-05 07:06:46,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 5732 transitions. [2021-06-05 07:06:46,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:06:46,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:46,032 INFO L521 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] [2021-06-05 07:06:46,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-06-05 07:06:46,232 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:46,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:46,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1930035334, now seen corresponding path program 45 times [2021-06-05 07:06:46,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:46,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230138040] [2021-06-05 07:06:46,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:46,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:46,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:46,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:46,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230138040] [2021-06-05 07:06:46,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230138040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:46,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893668095] [2021-06-05 07:06:46,355 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 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 [2021-06-05 07:06:46,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:06:46,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:46,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:06:46,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:46,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:46,562 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:46,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20 treesize of output 28 [2021-06-05 07:06:46,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:46,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:46,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 07:06:46,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:75 [2021-06-05 07:06:46,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:46,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893668095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:46,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:46,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 07:06:46,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661805701] [2021-06-05 07:06:46,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:06:46,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:46,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:06:46,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:06:46,669 INFO L87 Difference]: Start difference. First operand 1700 states and 5732 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-06-05 07:06:47,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:47,110 INFO L93 Difference]: Finished difference Result 2458 states and 8075 transitions. [2021-06-05 07:06:47,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:06:47,110 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 26 [2021-06-05 07:06:47,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:47,113 INFO L225 Difference]: With dead ends: 2458 [2021-06-05 07:06:47,113 INFO L226 Difference]: Without dead ends: 2443 [2021-06-05 07:06:47,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 508.4ms TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:06:47,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2443 states. [2021-06-05 07:06:47,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2443 to 1695. [2021-06-05 07:06:47,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1695 states, 1694 states have (on average 3.374852420306966) internal successors, (5717), 1694 states have internal predecessors, (5717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:47,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 5717 transitions. [2021-06-05 07:06:47,136 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 5717 transitions. Word has length 26 [2021-06-05 07:06:47,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:47,137 INFO L482 AbstractCegarLoop]: Abstraction has 1695 states and 5717 transitions. [2021-06-05 07:06:47,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-06-05 07:06:47,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 5717 transitions. [2021-06-05 07:06:47,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:06:47,139 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:47,139 INFO L521 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] [2021-06-05 07:06:47,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:47,353 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:47,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:47,353 INFO L82 PathProgramCache]: Analyzing trace with hash 436254142, now seen corresponding path program 46 times [2021-06-05 07:06:47,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:47,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150404941] [2021-06-05 07:06:47,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:47,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:47,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:47,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:47,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150404941] [2021-06-05 07:06:47,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150404941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:47,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960844157] [2021-06-05 07:06:47,489 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 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 [2021-06-05 07:06:47,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:06:47,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:47,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:06:47,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:47,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:47,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:06:47,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20 treesize of output 12 [2021-06-05 07:06:47,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:47,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:47,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:47,743 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 07:06:47,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:47,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960844157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:47,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:47,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 07:06:47,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36131524] [2021-06-05 07:06:47,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:06:47,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:47,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:06:47,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:06:47,764 INFO L87 Difference]: Start difference. First operand 1695 states and 5717 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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) [2021-06-05 07:06:48,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:48,254 INFO L93 Difference]: Finished difference Result 2251 states and 7431 transitions. [2021-06-05 07:06:48,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 07:06:48,254 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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 [2021-06-05 07:06:48,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:48,257 INFO L225 Difference]: With dead ends: 2251 [2021-06-05 07:06:48,257 INFO L226 Difference]: Without dead ends: 2236 [2021-06-05 07:06:48,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 503.9ms TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:06:48,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2021-06-05 07:06:48,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 1698. [2021-06-05 07:06:48,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1697 states have (on average 3.3783146729522686) internal successors, (5733), 1697 states have internal predecessors, (5733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:48,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 5733 transitions. [2021-06-05 07:06:48,277 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 5733 transitions. Word has length 26 [2021-06-05 07:06:48,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:48,278 INFO L482 AbstractCegarLoop]: Abstraction has 1698 states and 5733 transitions. [2021-06-05 07:06:48,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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) [2021-06-05 07:06:48,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 5733 transitions. [2021-06-05 07:06:48,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:06:48,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:48,280 INFO L521 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] [2021-06-05 07:06:48,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-05 07:06:48,481 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:48,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:48,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1514157122, now seen corresponding path program 47 times [2021-06-05 07:06:48,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:48,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596743354] [2021-06-05 07:06:48,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:48,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:48,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:48,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:48,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596743354] [2021-06-05 07:06:48,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596743354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:48,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112368591] [2021-06-05 07:06:48,590 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 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 [2021-06-05 07:06:48,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:06:48,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:48,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:06:48,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:48,776 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-06-05 07:06:48,777 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 49 [2021-06-05 07:06:48,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:48,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:48,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:48,783 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:5 [2021-06-05 07:06:48,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:48,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112368591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:48,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:48,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 07:06:48,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706415791] [2021-06-05 07:06:48,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:06:48,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:48,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:06:48,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:06:48,802 INFO L87 Difference]: Start difference. First operand 1698 states and 5733 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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) [2021-06-05 07:06:49,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:49,297 INFO L93 Difference]: Finished difference Result 2287 states and 7544 transitions. [2021-06-05 07:06:49,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 07:06:49,297 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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 [2021-06-05 07:06:49,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:49,300 INFO L225 Difference]: With dead ends: 2287 [2021-06-05 07:06:49,300 INFO L226 Difference]: Without dead ends: 2272 [2021-06-05 07:06:49,301 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 449.9ms TimeCoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:06:49,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2272 states. [2021-06-05 07:06:49,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2272 to 1716. [2021-06-05 07:06:49,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1715 states have (on average 3.3743440233236153) internal successors, (5787), 1715 states have internal predecessors, (5787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:49,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 5787 transitions. [2021-06-05 07:06:49,321 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 5787 transitions. Word has length 26 [2021-06-05 07:06:49,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:49,321 INFO L482 AbstractCegarLoop]: Abstraction has 1716 states and 5787 transitions. [2021-06-05 07:06:49,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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) [2021-06-05 07:06:49,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 5787 transitions. [2021-06-05 07:06:49,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:06:49,323 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:49,323 INFO L521 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] [2021-06-05 07:06:49,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-05 07:06:49,524 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:49,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:49,524 INFO L82 PathProgramCache]: Analyzing trace with hash -714815838, now seen corresponding path program 48 times [2021-06-05 07:06:49,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:49,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90073553] [2021-06-05 07:06:49,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:49,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:49,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:49,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:49,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90073553] [2021-06-05 07:06:49,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90073553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:49,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213145800] [2021-06-05 07:06:49,633 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 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 [2021-06-05 07:06:49,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:06:49,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:49,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:06:49,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:49,806 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 07:06:49,806 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-06-05 07:06:49,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:49,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:49,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:49,814 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:17 [2021-06-05 07:06:49,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:49,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213145800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:49,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:49,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 07:06:49,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188874238] [2021-06-05 07:06:49,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:06:49,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:49,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:06:49,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:06:49,851 INFO L87 Difference]: Start difference. First operand 1716 states and 5787 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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) [2021-06-05 07:06:50,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:50,643 INFO L93 Difference]: Finished difference Result 2276 states and 7538 transitions. [2021-06-05 07:06:50,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:06:50,643 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 [2021-06-05 07:06:50,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:50,646 INFO L225 Difference]: With dead ends: 2276 [2021-06-05 07:06:50,646 INFO L226 Difference]: Without dead ends: 2261 [2021-06-05 07:06:50,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 653.6ms TimeCoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:06:50,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2261 states. [2021-06-05 07:06:50,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2261 to 1734. [2021-06-05 07:06:50,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 3.3721869590305826) internal successors, (5844), 1733 states have internal predecessors, (5844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:50,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5844 transitions. [2021-06-05 07:06:50,668 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5844 transitions. Word has length 26 [2021-06-05 07:06:50,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:50,668 INFO L482 AbstractCegarLoop]: Abstraction has 1734 states and 5844 transitions. [2021-06-05 07:06:50,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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) [2021-06-05 07:06:50,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5844 transitions. [2021-06-05 07:06:50,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:06:50,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:50,670 INFO L521 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] [2021-06-05 07:06:50,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 07:06:50,873 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:50,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:50,873 INFO L82 PathProgramCache]: Analyzing trace with hash 272675774, now seen corresponding path program 49 times [2021-06-05 07:06:50,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:50,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631695682] [2021-06-05 07:06:50,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:50,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:50,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:50,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:50,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631695682] [2021-06-05 07:06:50,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631695682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:50,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645170878] [2021-06-05 07:06:50,980 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 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 [2021-06-05 07:06:51,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:51,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:06:51,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:51,161 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 07:06:51,161 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 54 [2021-06-05 07:06:51,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:51,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:51,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 07:06:51,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:69, output treesize:67 [2021-06-05 07:06:51,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:51,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645170878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:51,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:51,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 07:06:51,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317502175] [2021-06-05 07:06:51,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:06:51,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:51,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:06:51,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:06:51,255 INFO L87 Difference]: Start difference. First operand 1734 states and 5844 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-06-05 07:06:51,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:51,682 INFO L93 Difference]: Finished difference Result 2329 states and 7683 transitions. [2021-06-05 07:06:51,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 07:06:51,682 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 26 [2021-06-05 07:06:51,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:51,685 INFO L225 Difference]: With dead ends: 2329 [2021-06-05 07:06:51,685 INFO L226 Difference]: Without dead ends: 2304 [2021-06-05 07:06:51,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 440.6ms TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:06:51,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. [2021-06-05 07:06:51,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 1734. [2021-06-05 07:06:51,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 3.3744950952106176) internal successors, (5848), 1733 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:51,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5848 transitions. [2021-06-05 07:06:51,706 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5848 transitions. Word has length 26 [2021-06-05 07:06:51,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:51,706 INFO L482 AbstractCegarLoop]: Abstraction has 1734 states and 5848 transitions. [2021-06-05 07:06:51,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-06-05 07:06:51,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5848 transitions. [2021-06-05 07:06:51,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:06:51,708 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:51,708 INFO L521 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] [2021-06-05 07:06:51,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-06-05 07:06:51,909 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:51,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:51,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1537750790, now seen corresponding path program 50 times [2021-06-05 07:06:51,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:51,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215726401] [2021-06-05 07:06:51,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:51,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:52,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:52,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:52,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215726401] [2021-06-05 07:06:52,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215726401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:52,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679800233] [2021-06-05 07:06:52,021 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 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 [2021-06-05 07:06:52,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:06:52,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:52,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:06:52,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:52,178 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 07:06:52,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-06-05 07:06:52,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:52,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:52,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:52,186 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:17 [2021-06-05 07:06:52,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:52,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679800233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:52,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:52,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 07:06:52,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858746942] [2021-06-05 07:06:52,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:06:52,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:52,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:06:52,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:06:52,230 INFO L87 Difference]: Start difference. First operand 1734 states and 5848 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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) [2021-06-05 07:06:52,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:52,690 INFO L93 Difference]: Finished difference Result 2281 states and 7556 transitions. [2021-06-05 07:06:52,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 07:06:52,691 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 [2021-06-05 07:06:52,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:52,694 INFO L225 Difference]: With dead ends: 2281 [2021-06-05 07:06:52,694 INFO L226 Difference]: Without dead ends: 2266 [2021-06-05 07:06:52,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 455.6ms TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:06:52,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2266 states. [2021-06-05 07:06:52,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2266 to 1734. [2021-06-05 07:06:52,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 3.3744950952106176) internal successors, (5848), 1733 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:52,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5848 transitions. [2021-06-05 07:06:52,714 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5848 transitions. Word has length 26 [2021-06-05 07:06:52,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:52,714 INFO L482 AbstractCegarLoop]: Abstraction has 1734 states and 5848 transitions. [2021-06-05 07:06:52,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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) [2021-06-05 07:06:52,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5848 transitions. [2021-06-05 07:06:52,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:06:52,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:52,716 INFO L521 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] [2021-06-05 07:06:52,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:52,917 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:52,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:52,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1909155608, now seen corresponding path program 56 times [2021-06-05 07:06:52,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:52,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602146211] [2021-06-05 07:06:52,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:52,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:53,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:53,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:53,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602146211] [2021-06-05 07:06:53,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602146211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:53,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173853733] [2021-06-05 07:06:53,167 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 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 [2021-06-05 07:06:53,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:06:53,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:53,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 07:06:53,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:53,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:53,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:53,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:06:53,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:06:53,332 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 23 treesize of output 11 [2021-06-05 07:06:53,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:53,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:53,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:53,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:15 [2021-06-05 07:06:53,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:53,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173853733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:53,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:53,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 07:06:53,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436248751] [2021-06-05 07:06:53,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:06:53,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:53,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:06:53,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:06:53,375 INFO L87 Difference]: Start difference. First operand 1734 states and 5848 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-06-05 07:06:53,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:53,855 INFO L93 Difference]: Finished difference Result 2265 states and 7364 transitions. [2021-06-05 07:06:53,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 07:06:53,855 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 [2021-06-05 07:06:53,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:53,858 INFO L225 Difference]: With dead ends: 2265 [2021-06-05 07:06:53,858 INFO L226 Difference]: Without dead ends: 2220 [2021-06-05 07:06:53,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 595.1ms TimeCoverageRelationStatistics Valid=191, Invalid=739, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:06:53,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2021-06-05 07:06:53,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 1752. [2021-06-05 07:06:53,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 3.366647629925757) internal successors, (5895), 1751 states have internal predecessors, (5895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:53,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5895 transitions. [2021-06-05 07:06:53,879 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5895 transitions. Word has length 26 [2021-06-05 07:06:53,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:53,879 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 5895 transitions. [2021-06-05 07:06:53,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-06-05 07:06:53,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5895 transitions. [2021-06-05 07:06:53,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:06:53,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:53,881 INFO L521 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] [2021-06-05 07:06:54,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:54,083 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:54,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:54,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1847280054, now seen corresponding path program 57 times [2021-06-05 07:06:54,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:54,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348637622] [2021-06-05 07:06:54,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:54,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:54,288 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:54,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:54,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348637622] [2021-06-05 07:06:54,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348637622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:54,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354606403] [2021-06-05 07:06:54,289 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 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 [2021-06-05 07:06:54,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:06:54,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:54,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:06:54,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:54,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:54,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:54,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:54,514 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:54,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 07:06:54,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:06:54,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:54,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:54,529 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:33 [2021-06-05 07:06:54,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:54,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354606403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:54,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:54,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 07:06:54,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093244434] [2021-06-05 07:06:54,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:06:54,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:54,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:06:54,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:06:54,586 INFO L87 Difference]: Start difference. First operand 1752 states and 5895 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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) [2021-06-05 07:06:56,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:56,149 INFO L93 Difference]: Finished difference Result 2446 states and 7986 transitions. [2021-06-05 07:06:56,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:06:56,150 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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 [2021-06-05 07:06:56,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:56,153 INFO L225 Difference]: With dead ends: 2446 [2021-06-05 07:06:56,153 INFO L226 Difference]: Without dead ends: 2431 [2021-06-05 07:06:56,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 1330.5ms TimeCoverageRelationStatistics Valid=360, Invalid=1802, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:06:56,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2431 states. [2021-06-05 07:06:56,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2431 to 1746. [2021-06-05 07:06:56,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1745 states have (on average 3.3650429799426935) internal successors, (5872), 1745 states have internal predecessors, (5872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:56,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 5872 transitions. [2021-06-05 07:06:56,174 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 5872 transitions. Word has length 26 [2021-06-05 07:06:56,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:56,175 INFO L482 AbstractCegarLoop]: Abstraction has 1746 states and 5872 transitions. [2021-06-05 07:06:56,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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) [2021-06-05 07:06:56,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 5872 transitions. [2021-06-05 07:06:56,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:06:56,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:56,177 INFO L521 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] [2021-06-05 07:06:56,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-05 07:06:56,377 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:56,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:56,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1872442310, now seen corresponding path program 58 times [2021-06-05 07:06:56,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:56,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690664905] [2021-06-05 07:06:56,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:56,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:56,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:56,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:56,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690664905] [2021-06-05 07:06:56,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690664905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:56,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476633879] [2021-06-05 07:06:56,535 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 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 [2021-06-05 07:06:56,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:06:56,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:56,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:06:56,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:56,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:06:56,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:56,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:56,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:06:56,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 07:06:56,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:56,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:56,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:56,672 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 07:06:56,686 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:56,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476633879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:56,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:56,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-06-05 07:06:56,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660581861] [2021-06-05 07:06:56,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:06:56,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:56,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:06:56,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:06:56,687 INFO L87 Difference]: Start difference. First operand 1746 states and 5872 transitions. Second operand has 16 states, 16 states have (on average 2.625) 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) [2021-06-05 07:06:57,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:57,090 INFO L93 Difference]: Finished difference Result 2059 states and 6675 transitions. [2021-06-05 07:06:57,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:06:57,090 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) 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 26 [2021-06-05 07:06:57,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:57,093 INFO L225 Difference]: With dead ends: 2059 [2021-06-05 07:06:57,093 INFO L226 Difference]: Without dead ends: 2037 [2021-06-05 07:06:57,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 374.8ms TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:06:57,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2037 states. [2021-06-05 07:06:57,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2037 to 1748. [2021-06-05 07:06:57,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1748 states, 1747 states have (on average 3.36519748139668) internal successors, (5879), 1747 states have internal predecessors, (5879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:57,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 5879 transitions. [2021-06-05 07:06:57,115 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 5879 transitions. Word has length 26 [2021-06-05 07:06:57,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:57,115 INFO L482 AbstractCegarLoop]: Abstraction has 1748 states and 5879 transitions. [2021-06-05 07:06:57,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) 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) [2021-06-05 07:06:57,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 5879 transitions. [2021-06-05 07:06:57,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:06:57,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:57,117 INFO L521 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] [2021-06-05 07:06:57,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:57,319 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:57,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:57,319 INFO L82 PathProgramCache]: Analyzing trace with hash -804567746, now seen corresponding path program 59 times [2021-06-05 07:06:57,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:57,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995555867] [2021-06-05 07:06:57,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:57,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:57,511 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:57,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:57,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995555867] [2021-06-05 07:06:57,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995555867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:57,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217190138] [2021-06-05 07:06:57,511 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 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 [2021-06-05 07:06:57,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:06:57,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:57,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:06:57,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:57,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:57,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:57,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:57,690 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:57,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 07:06:57,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:06:57,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:57,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:57,706 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:33 [2021-06-05 07:06:57,753 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:57,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217190138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:57,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:57,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 07:06:57,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168829409] [2021-06-05 07:06:57,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:06:57,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:57,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:06:57,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:06:57,754 INFO L87 Difference]: Start difference. First operand 1748 states and 5879 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) [2021-06-05 07:06:58,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:58,690 INFO L93 Difference]: Finished difference Result 2318 states and 7610 transitions. [2021-06-05 07:06:58,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:06:58,690 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 [2021-06-05 07:06:58,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:58,694 INFO L225 Difference]: With dead ends: 2318 [2021-06-05 07:06:58,694 INFO L226 Difference]: Without dead ends: 2276 [2021-06-05 07:06:58,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 819.7ms TimeCoverageRelationStatistics Valid=229, Invalid=1031, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:06:58,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2276 states. [2021-06-05 07:06:58,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2276 to 1772. [2021-06-05 07:06:58,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1772 states, 1771 states have (on average 3.3585544889892716) internal successors, (5948), 1771 states have internal predecessors, (5948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:58,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 5948 transitions. [2021-06-05 07:06:58,717 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 5948 transitions. Word has length 26 [2021-06-05 07:06:58,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:58,717 INFO L482 AbstractCegarLoop]: Abstraction has 1772 states and 5948 transitions. [2021-06-05 07:06:58,717 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) [2021-06-05 07:06:58,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 5948 transitions. [2021-06-05 07:06:58,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:06:58,719 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:58,719 INFO L521 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] [2021-06-05 07:06:58,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:58,919 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:58,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:58,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1162419966, now seen corresponding path program 60 times [2021-06-05 07:06:58,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:58,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072287365] [2021-06-05 07:06:58,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:58,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:59,105 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:59,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:59,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072287365] [2021-06-05 07:06:59,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072287365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:59,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341447960] [2021-06-05 07:06:59,105 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 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 [2021-06-05 07:06:59,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:06:59,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:59,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:06:59,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:59,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:06:59,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:06:59,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:06:59,240 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 21 treesize of output 11 [2021-06-05 07:06:59,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:59,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:59,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:59,247 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 07:06:59,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:59,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341447960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:59,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:59,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-06-05 07:06:59,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009828590] [2021-06-05 07:06:59,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:06:59,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:59,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:06:59,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:06:59,278 INFO L87 Difference]: Start difference. First operand 1772 states and 5948 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 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) [2021-06-05 07:06:59,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:59,809 INFO L93 Difference]: Finished difference Result 2209 states and 7265 transitions. [2021-06-05 07:06:59,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 07:06:59,810 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 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 26 [2021-06-05 07:06:59,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:59,813 INFO L225 Difference]: With dead ends: 2209 [2021-06-05 07:06:59,813 INFO L226 Difference]: Without dead ends: 2178 [2021-06-05 07:06:59,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 505.4ms TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:06:59,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2178 states. [2021-06-05 07:06:59,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2178 to 1768. [2021-06-05 07:06:59,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1768 states, 1767 states have (on average 3.3604980192416525) internal successors, (5938), 1767 states have internal predecessors, (5938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:59,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 5938 transitions. [2021-06-05 07:06:59,834 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 5938 transitions. Word has length 26 [2021-06-05 07:06:59,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:59,834 INFO L482 AbstractCegarLoop]: Abstraction has 1768 states and 5938 transitions. [2021-06-05 07:06:59,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 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) [2021-06-05 07:06:59,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 5938 transitions. [2021-06-05 07:06:59,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:06:59,836 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:59,836 INFO L521 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] [2021-06-05 07:07:00,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:00,036 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:00,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:00,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1833133118, now seen corresponding path program 61 times [2021-06-05 07:07:00,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:00,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893582150] [2021-06-05 07:07:00,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:00,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:00,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:00,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:00,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893582150] [2021-06-05 07:07:00,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893582150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:00,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944341932] [2021-06-05 07:07:00,218 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 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 [2021-06-05 07:07:00,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:00,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:07:00,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:00,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:00,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:07:00,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:07:00,361 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 07:07:00,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:00,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:00,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:00,367 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 07:07:00,386 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:00,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944341932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:00,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:00,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-06-05 07:07:00,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024530808] [2021-06-05 07:07:00,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:07:00,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:00,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:07:00,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:07:00,387 INFO L87 Difference]: Start difference. First operand 1768 states and 5938 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 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) [2021-06-05 07:07:00,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:00,731 INFO L93 Difference]: Finished difference Result 2198 states and 7242 transitions. [2021-06-05 07:07:00,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 07:07:00,731 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 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 26 [2021-06-05 07:07:00,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:00,734 INFO L225 Difference]: With dead ends: 2198 [2021-06-05 07:07:00,735 INFO L226 Difference]: Without dead ends: 2183 [2021-06-05 07:07:00,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 446.3ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:07:00,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2183 states. [2021-06-05 07:07:00,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2183 to 1768. [2021-06-05 07:07:00,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1768 states, 1767 states have (on average 3.3604980192416525) internal successors, (5938), 1767 states have internal predecessors, (5938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:00,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 5938 transitions. [2021-06-05 07:07:00,768 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 5938 transitions. Word has length 26 [2021-06-05 07:07:00,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:00,768 INFO L482 AbstractCegarLoop]: Abstraction has 1768 states and 5938 transitions. [2021-06-05 07:07:00,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 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) [2021-06-05 07:07:00,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 5938 transitions. [2021-06-05 07:07:00,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:07:00,770 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:00,770 INFO L521 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] [2021-06-05 07:07:00,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-06-05 07:07:00,971 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:00,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:00,971 INFO L82 PathProgramCache]: Analyzing trace with hash 179857598, now seen corresponding path program 51 times [2021-06-05 07:07:00,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:00,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689033513] [2021-06-05 07:07:00,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:00,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:01,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:01,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:01,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689033513] [2021-06-05 07:07:01,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689033513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:01,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138813954] [2021-06-05 07:07:01,177 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 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 [2021-06-05 07:07:01,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:07:01,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:01,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:07:01,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:01,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:07:01,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:01,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20 treesize of output 12 [2021-06-05 07:07:01,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:01,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:01,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:01,433 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-06-05 07:07:01,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:01,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138813954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:01,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:01,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 07:07:01,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122404198] [2021-06-05 07:07:01,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:07:01,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:01,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:07:01,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:07:01,453 INFO L87 Difference]: Start difference. First operand 1768 states and 5938 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-06-05 07:07:02,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:02,442 INFO L93 Difference]: Finished difference Result 2386 states and 7756 transitions. [2021-06-05 07:07:02,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 07:07:02,442 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 26 [2021-06-05 07:07:02,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:02,445 INFO L225 Difference]: With dead ends: 2386 [2021-06-05 07:07:02,445 INFO L226 Difference]: Without dead ends: 2371 [2021-06-05 07:07:02,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 773.0ms TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:07:02,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2371 states. [2021-06-05 07:07:02,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2371 to 1779. [2021-06-05 07:07:02,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1779 states, 1778 states have (on average 3.361079865016873) internal successors, (5976), 1778 states have internal predecessors, (5976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:02,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1779 states to 1779 states and 5976 transitions. [2021-06-05 07:07:02,467 INFO L78 Accepts]: Start accepts. Automaton has 1779 states and 5976 transitions. Word has length 26 [2021-06-05 07:07:02,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:02,467 INFO L482 AbstractCegarLoop]: Abstraction has 1779 states and 5976 transitions. [2021-06-05 07:07:02,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-06-05 07:07:02,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1779 states and 5976 transitions. [2021-06-05 07:07:02,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:07:02,470 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:02,470 INFO L521 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] [2021-06-05 07:07:02,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:02,689 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:02,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:02,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1730239162, now seen corresponding path program 62 times [2021-06-05 07:07:02,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:02,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103663320] [2021-06-05 07:07:02,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:02,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:02,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:02,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:02,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103663320] [2021-06-05 07:07:02,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103663320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:02,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018144113] [2021-06-05 07:07:02,825 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 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 [2021-06-05 07:07:02,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:07:02,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:02,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:07:02,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:02,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:07:02,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:02,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:07:02,993 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 21 treesize of output 11 [2021-06-05 07:07:02,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:02,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:02,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:02,999 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 07:07:03,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:03,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018144113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:03,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:03,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 07:07:03,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774486941] [2021-06-05 07:07:03,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:07:03,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:03,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:07:03,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:07:03,013 INFO L87 Difference]: Start difference. First operand 1779 states and 5976 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) 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) [2021-06-05 07:07:03,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:03,760 INFO L93 Difference]: Finished difference Result 2670 states and 8464 transitions. [2021-06-05 07:07:03,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:07:03,760 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) 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 26 [2021-06-05 07:07:03,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:03,764 INFO L225 Difference]: With dead ends: 2670 [2021-06-05 07:07:03,764 INFO L226 Difference]: Without dead ends: 2648 [2021-06-05 07:07:03,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 645.8ms TimeCoverageRelationStatistics Valid=236, Invalid=954, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:07:03,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2021-06-05 07:07:03,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 1831. [2021-06-05 07:07:03,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1831 states, 1830 states have (on average 3.3666666666666667) internal successors, (6161), 1830 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) [2021-06-05 07:07:03,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 6161 transitions. [2021-06-05 07:07:03,789 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 6161 transitions. Word has length 26 [2021-06-05 07:07:03,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:03,789 INFO L482 AbstractCegarLoop]: Abstraction has 1831 states and 6161 transitions. [2021-06-05 07:07:03,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) 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) [2021-06-05 07:07:03,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 6161 transitions. [2021-06-05 07:07:03,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:07:03,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:03,791 INFO L521 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] [2021-06-05 07:07:03,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:03,992 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:03,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:03,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1769727974, now seen corresponding path program 52 times [2021-06-05 07:07:03,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:03,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935657469] [2021-06-05 07:07:03,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:03,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:04,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:04,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:04,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935657469] [2021-06-05 07:07:04,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935657469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:04,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724318026] [2021-06-05 07:07:04,181 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 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 [2021-06-05 07:07:04,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:07:04,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:04,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:07:04,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:04,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:07:04,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:04,404 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 20 treesize of output 12 [2021-06-05 07:07:04,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:04,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:04,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:04,410 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-06-05 07:07:04,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:04,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724318026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:04,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:04,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 07:07:04,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221996427] [2021-06-05 07:07:04,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:07:04,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:04,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:07:04,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:07:04,427 INFO L87 Difference]: Start difference. First operand 1831 states and 6161 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-06-05 07:07:05,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:05,445 INFO L93 Difference]: Finished difference Result 2547 states and 8275 transitions. [2021-06-05 07:07:05,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:07:05,446 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 26 [2021-06-05 07:07:05,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:05,449 INFO L225 Difference]: With dead ends: 2547 [2021-06-05 07:07:05,450 INFO L226 Difference]: Without dead ends: 2532 [2021-06-05 07:07:05,450 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 794.3ms TimeCoverageRelationStatistics Valid=232, Invalid=824, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:07:05,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2021-06-05 07:07:05,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 1836. [2021-06-05 07:07:05,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1836 states, 1835 states have (on average 3.3678474114441417) internal successors, (6180), 1835 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) [2021-06-05 07:07:05,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1836 states to 1836 states and 6180 transitions. [2021-06-05 07:07:05,474 INFO L78 Accepts]: Start accepts. Automaton has 1836 states and 6180 transitions. Word has length 26 [2021-06-05 07:07:05,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:05,474 INFO L482 AbstractCegarLoop]: Abstraction has 1836 states and 6180 transitions. [2021-06-05 07:07:05,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-06-05 07:07:05,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1836 states and 6180 transitions. [2021-06-05 07:07:05,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:07:05,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:05,476 INFO L521 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] [2021-06-05 07:07:05,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:05,677 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:05,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:05,677 INFO L82 PathProgramCache]: Analyzing trace with hash 152195194, now seen corresponding path program 53 times [2021-06-05 07:07:05,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:05,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258548850] [2021-06-05 07:07:05,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:05,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:05,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:05,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:05,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258548850] [2021-06-05 07:07:05,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258548850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:05,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892865663] [2021-06-05 07:07:05,829 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 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 [2021-06-05 07:07:05,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:07:05,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:05,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 07:07:05,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:06,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:06,027 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:06,028 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 20 treesize of output 20 [2021-06-05 07:07:06,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:07:06,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:06,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:06,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2021-06-05 07:07:06,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:06,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892865663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:06,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:06,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 07:07:06,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346526492] [2021-06-05 07:07:06,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:07:06,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:06,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:07:06,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:07:06,077 INFO L87 Difference]: Start difference. First operand 1836 states and 6180 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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) [2021-06-05 07:07:07,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:07,167 INFO L93 Difference]: Finished difference Result 2824 states and 9165 transitions. [2021-06-05 07:07:07,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:07:07,167 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 26 [2021-06-05 07:07:07,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:07,171 INFO L225 Difference]: With dead ends: 2824 [2021-06-05 07:07:07,171 INFO L226 Difference]: Without dead ends: 2809 [2021-06-05 07:07:07,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 825.7ms TimeCoverageRelationStatistics Valid=294, Invalid=1038, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:07:07,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2809 states. [2021-06-05 07:07:07,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2809 to 1827. [2021-06-05 07:07:07,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1827 states, 1826 states have (on average 3.3663745892661554) internal successors, (6147), 1826 states have internal predecessors, (6147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:07,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1827 states to 1827 states and 6147 transitions. [2021-06-05 07:07:07,199 INFO L78 Accepts]: Start accepts. Automaton has 1827 states and 6147 transitions. Word has length 26 [2021-06-05 07:07:07,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:07,199 INFO L482 AbstractCegarLoop]: Abstraction has 1827 states and 6147 transitions. [2021-06-05 07:07:07,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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) [2021-06-05 07:07:07,199 INFO L276 IsEmpty]: Start isEmpty. Operand 1827 states and 6147 transitions. [2021-06-05 07:07:07,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:07:07,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:07,201 INFO L521 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] [2021-06-05 07:07:07,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:07,402 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:07,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:07,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1956232686, now seen corresponding path program 63 times [2021-06-05 07:07:07,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:07,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301427325] [2021-06-05 07:07:07,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:07,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:07,521 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:07,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:07,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301427325] [2021-06-05 07:07:07,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301427325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:07,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852859254] [2021-06-05 07:07:07,522 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 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 [2021-06-05 07:07:07,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:07:07,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:07,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:07:07,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:07,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:07,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:07,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:07:07,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:07:07,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 07:07:07,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:07,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:07,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:07,683 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 07:07:07,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:07,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852859254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:07,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:07,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 07:07:07,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782713743] [2021-06-05 07:07:07,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:07:07,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:07,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:07:07,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:07:07,701 INFO L87 Difference]: Start difference. First operand 1827 states and 6147 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 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) [2021-06-05 07:07:08,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:08,453 INFO L93 Difference]: Finished difference Result 3158 states and 10100 transitions. [2021-06-05 07:07:08,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:07:08,453 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 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 26 [2021-06-05 07:07:08,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:08,458 INFO L225 Difference]: With dead ends: 3158 [2021-06-05 07:07:08,458 INFO L226 Difference]: Without dead ends: 3128 [2021-06-05 07:07:08,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 608.7ms TimeCoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:07:08,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3128 states. [2021-06-05 07:07:08,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3128 to 1885. [2021-06-05 07:07:08,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1884 states have (on average 3.3694267515923566) internal successors, (6348), 1884 states have internal predecessors, (6348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:08,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 6348 transitions. [2021-06-05 07:07:08,487 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 6348 transitions. Word has length 26 [2021-06-05 07:07:08,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:08,487 INFO L482 AbstractCegarLoop]: Abstraction has 1885 states and 6348 transitions. [2021-06-05 07:07:08,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 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) [2021-06-05 07:07:08,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 6348 transitions. [2021-06-05 07:07:08,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:07:08,489 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:08,489 INFO L521 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] [2021-06-05 07:07:08,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable277,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:08,690 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:08,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:08,690 INFO L82 PathProgramCache]: Analyzing trace with hash -505085958, now seen corresponding path program 64 times [2021-06-05 07:07:08,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:08,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272299034] [2021-06-05 07:07:08,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:08,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:08,819 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:08,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:08,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272299034] [2021-06-05 07:07:08,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272299034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:08,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372228315] [2021-06-05 07:07:08,820 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 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 [2021-06-05 07:07:08,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:07:08,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:08,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:07:08,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:08,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:08,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:08,945 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:08,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 39 [2021-06-05 07:07:08,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:07:08,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:08,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:08,969 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-06-05 07:07:09,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:09,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372228315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:09,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:09,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 07:07:09,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012782749] [2021-06-05 07:07:09,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:07:09,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:09,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:07:09,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:07:09,013 INFO L87 Difference]: Start difference. First operand 1885 states and 6348 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 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) [2021-06-05 07:07:10,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:10,120 INFO L93 Difference]: Finished difference Result 3602 states and 11423 transitions. [2021-06-05 07:07:10,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:07:10,121 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 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 26 [2021-06-05 07:07:10,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:10,126 INFO L225 Difference]: With dead ends: 3602 [2021-06-05 07:07:10,126 INFO L226 Difference]: Without dead ends: 3558 [2021-06-05 07:07:10,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 941.5ms TimeCoverageRelationStatistics Valid=345, Invalid=1295, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:07:10,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3558 states. [2021-06-05 07:07:10,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3558 to 1897. [2021-06-05 07:07:10,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1897 states, 1896 states have (on average 3.37289029535865) internal successors, (6395), 1896 states have internal predecessors, (6395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:10,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 6395 transitions. [2021-06-05 07:07:10,158 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 6395 transitions. Word has length 26 [2021-06-05 07:07:10,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:10,158 INFO L482 AbstractCegarLoop]: Abstraction has 1897 states and 6395 transitions. [2021-06-05 07:07:10,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 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) [2021-06-05 07:07:10,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 6395 transitions. [2021-06-05 07:07:10,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:07:10,160 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:10,160 INFO L521 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] [2021-06-05 07:07:10,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-05 07:07:10,361 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:10,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:10,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1345416738, now seen corresponding path program 54 times [2021-06-05 07:07:10,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:10,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145640326] [2021-06-05 07:07:10,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:10,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:10,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:10,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:10,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145640326] [2021-06-05 07:07:10,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145640326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:10,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129998345] [2021-06-05 07:07:10,521 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 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 [2021-06-05 07:07:10,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:07:10,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:10,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:07:10,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:10,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:10,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:10,676 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:10,676 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 35 treesize of output 31 [2021-06-05 07:07:10,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:07:10,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:10,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:10,684 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:22 [2021-06-05 07:07:10,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:10,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129998345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:10,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:10,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 07:07:10,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252408654] [2021-06-05 07:07:10,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:07:10,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:10,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:07:10,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:07:10,720 INFO L87 Difference]: Start difference. First operand 1897 states and 6395 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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) [2021-06-05 07:07:11,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:11,908 INFO L93 Difference]: Finished difference Result 2547 states and 8408 transitions. [2021-06-05 07:07:11,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:07:11,909 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 [2021-06-05 07:07:11,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:11,912 INFO L225 Difference]: With dead ends: 2547 [2021-06-05 07:07:11,912 INFO L226 Difference]: Without dead ends: 2532 [2021-06-05 07:07:11,913 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 912.3ms TimeCoverageRelationStatistics Valid=262, Invalid=1378, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:07:11,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2021-06-05 07:07:11,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 1907. [2021-06-05 07:07:11,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1907 states, 1906 states have (on average 3.3698845750262327) internal successors, (6423), 1906 states have internal predecessors, (6423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:11,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1907 states to 1907 states and 6423 transitions. [2021-06-05 07:07:11,936 INFO L78 Accepts]: Start accepts. Automaton has 1907 states and 6423 transitions. Word has length 26 [2021-06-05 07:07:11,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:11,936 INFO L482 AbstractCegarLoop]: Abstraction has 1907 states and 6423 transitions. [2021-06-05 07:07:11,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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) [2021-06-05 07:07:11,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1907 states and 6423 transitions. [2021-06-05 07:07:11,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:07:11,938 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:11,938 INFO L521 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] [2021-06-05 07:07:12,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable284 [2021-06-05 07:07:12,139 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:12,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:12,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1962058946, now seen corresponding path program 55 times [2021-06-05 07:07:12,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:12,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060070118] [2021-06-05 07:07:12,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:12,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:12,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:12,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:12,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060070118] [2021-06-05 07:07:12,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060070118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:12,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667953954] [2021-06-05 07:07:12,284 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 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 [2021-06-05 07:07:12,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:12,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:07:12,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:12,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:12,431 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:12,432 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 07:07:12,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:12,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:12,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 07:07:12,452 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:75 [2021-06-05 07:07:12,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:12,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667953954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:12,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:12,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 07:07:12,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143862037] [2021-06-05 07:07:12,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:07:12,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:12,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:07:12,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:07:12,525 INFO L87 Difference]: Start difference. First operand 1907 states and 6423 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-06-05 07:07:13,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:13,267 INFO L93 Difference]: Finished difference Result 2690 states and 8822 transitions. [2021-06-05 07:07:13,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:07:13,268 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 26 [2021-06-05 07:07:13,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:13,271 INFO L225 Difference]: With dead ends: 2690 [2021-06-05 07:07:13,271 INFO L226 Difference]: Without dead ends: 2665 [2021-06-05 07:07:13,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 641.1ms TimeCoverageRelationStatistics Valid=251, Invalid=871, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 07:07:13,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2021-06-05 07:07:13,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 1893. [2021-06-05 07:07:13,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1892 states have (on average 3.374735729386892) internal successors, (6385), 1892 states have internal predecessors, (6385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:13,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 6385 transitions. [2021-06-05 07:07:13,295 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 6385 transitions. Word has length 26 [2021-06-05 07:07:13,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:13,295 INFO L482 AbstractCegarLoop]: Abstraction has 1893 states and 6385 transitions. [2021-06-05 07:07:13,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-06-05 07:07:13,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 6385 transitions. [2021-06-05 07:07:13,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:07:13,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:13,297 INFO L521 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] [2021-06-05 07:07:13,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:13,501 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:13,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:13,501 INFO L82 PathProgramCache]: Analyzing trace with hash 935709652, now seen corresponding path program 65 times [2021-06-05 07:07:13,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:13,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385804846] [2021-06-05 07:07:13,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:13,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:13,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:13,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385804846] [2021-06-05 07:07:13,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385804846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:13,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825693294] [2021-06-05 07:07:13,642 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 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 [2021-06-05 07:07:13,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:07:13,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:13,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:07:13,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:13,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:07:13,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:13,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:07:13,834 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 21 treesize of output 11 [2021-06-05 07:07:13,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:13,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:13,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:13,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 07:07:13,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:13,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825693294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:13,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:13,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 07:07:13,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080726026] [2021-06-05 07:07:13,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:07:13,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:13,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:07:13,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:07:13,857 INFO L87 Difference]: Start difference. First operand 1893 states and 6385 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) 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) [2021-06-05 07:07:14,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:14,706 INFO L93 Difference]: Finished difference Result 2560 states and 8375 transitions. [2021-06-05 07:07:14,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:07:14,706 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) 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 26 [2021-06-05 07:07:14,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:14,710 INFO L225 Difference]: With dead ends: 2560 [2021-06-05 07:07:14,710 INFO L226 Difference]: Without dead ends: 2538 [2021-06-05 07:07:14,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 830.4ms TimeCoverageRelationStatistics Valid=253, Invalid=1007, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:07:14,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2538 states. [2021-06-05 07:07:14,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2538 to 1893. [2021-06-05 07:07:14,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1892 states have (on average 3.375264270613108) internal successors, (6386), 1892 states have internal predecessors, (6386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:14,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 6386 transitions. [2021-06-05 07:07:14,734 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 6386 transitions. Word has length 26 [2021-06-05 07:07:14,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:14,735 INFO L482 AbstractCegarLoop]: Abstraction has 1893 states and 6386 transitions. [2021-06-05 07:07:14,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) 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) [2021-06-05 07:07:14,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 6386 transitions. [2021-06-05 07:07:14,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:07:14,737 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:14,737 INFO L521 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] [2021-06-05 07:07:14,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:14,937 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:14,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:14,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1778019666, now seen corresponding path program 66 times [2021-06-05 07:07:14,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:14,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787251191] [2021-06-05 07:07:14,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:14,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:15,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:15,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:15,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787251191] [2021-06-05 07:07:15,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787251191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:15,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051475345] [2021-06-05 07:07:15,089 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 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 [2021-06-05 07:07:15,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:07:15,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:15,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 07:07:15,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:15,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:15,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:15,271 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:15,271 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 [2021-06-05 07:07:15,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:07:15,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:15,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:15,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:26 [2021-06-05 07:07:15,372 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:15,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051475345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:15,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:15,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 07:07:15,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665434330] [2021-06-05 07:07:15,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:07:15,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:15,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:07:15,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:07:15,373 INFO L87 Difference]: Start difference. First operand 1893 states and 6386 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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) [2021-06-05 07:07:16,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:16,989 INFO L93 Difference]: Finished difference Result 3121 states and 9982 transitions. [2021-06-05 07:07:16,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 07:07:16,989 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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 [2021-06-05 07:07:16,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:16,994 INFO L225 Difference]: With dead ends: 3121 [2021-06-05 07:07:16,994 INFO L226 Difference]: Without dead ends: 3055 [2021-06-05 07:07:16,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 1225.4ms TimeCoverageRelationStatistics Valid=387, Invalid=1593, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 07:07:16,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3055 states. [2021-06-05 07:07:17,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3055 to 1882. [2021-06-05 07:07:17,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1881 states have (on average 3.3694843168527377) internal successors, (6338), 1881 states have internal predecessors, (6338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:17,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 6338 transitions. [2021-06-05 07:07:17,021 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 6338 transitions. Word has length 26 [2021-06-05 07:07:17,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:17,021 INFO L482 AbstractCegarLoop]: Abstraction has 1882 states and 6338 transitions. [2021-06-05 07:07:17,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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) [2021-06-05 07:07:17,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 6338 transitions. [2021-06-05 07:07:17,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:07:17,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:17,023 INFO L521 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] [2021-06-05 07:07:17,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2021-06-05 07:07:17,224 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:17,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:17,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1066719206, now seen corresponding path program 56 times [2021-06-05 07:07:17,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:17,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931117015] [2021-06-05 07:07:17,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:17,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:17,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:17,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:17,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931117015] [2021-06-05 07:07:17,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931117015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:17,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4383692] [2021-06-05 07:07:17,343 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 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 [2021-06-05 07:07:17,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:07:17,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:17,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:07:17,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:17,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:17,517 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:17,517 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 20 treesize of output 20 [2021-06-05 07:07:17,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:07:17,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:17,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:17,525 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-06-05 07:07:17,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:17,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4383692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:17,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:17,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 07:07:17,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978984674] [2021-06-05 07:07:17,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:07:17,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:17,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:07:17,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:07:17,561 INFO L87 Difference]: Start difference. First operand 1882 states and 6338 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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) [2021-06-05 07:07:18,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:18,459 INFO L93 Difference]: Finished difference Result 2561 states and 8454 transitions. [2021-06-05 07:07:18,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 07:07:18,459 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 [2021-06-05 07:07:18,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:18,463 INFO L225 Difference]: With dead ends: 2561 [2021-06-05 07:07:18,463 INFO L226 Difference]: Without dead ends: 2546 [2021-06-05 07:07:18,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 707.3ms TimeCoverageRelationStatistics Valid=215, Invalid=1117, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:07:18,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2546 states. [2021-06-05 07:07:18,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2546 to 1884. [2021-06-05 07:07:18,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1884 states, 1883 states have (on average 3.365374402549124) internal successors, (6337), 1883 states have internal predecessors, (6337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:18,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 6337 transitions. [2021-06-05 07:07:18,486 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 6337 transitions. Word has length 26 [2021-06-05 07:07:18,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:18,486 INFO L482 AbstractCegarLoop]: Abstraction has 1884 states and 6337 transitions. [2021-06-05 07:07:18,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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) [2021-06-05 07:07:18,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 6337 transitions. [2021-06-05 07:07:18,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:07:18,489 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:18,489 INFO L521 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] [2021-06-05 07:07:18,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:18,689 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:18,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:18,689 INFO L82 PathProgramCache]: Analyzing trace with hash 2054210818, now seen corresponding path program 57 times [2021-06-05 07:07:18,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:18,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993976887] [2021-06-05 07:07:18,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:18,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:18,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:18,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:18,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993976887] [2021-06-05 07:07:18,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993976887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:18,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156673738] [2021-06-05 07:07:18,810 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 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 [2021-06-05 07:07:18,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:07:18,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:18,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:07:18,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:18,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:18,983 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:18,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 07:07:18,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:18,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:19,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 07:07:19,005 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:67 [2021-06-05 07:07:19,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:19,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156673738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:19,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:19,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 07:07:19,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549008717] [2021-06-05 07:07:19,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:07:19,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:19,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:07:19,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:07:19,078 INFO L87 Difference]: Start difference. First operand 1884 states and 6337 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-06-05 07:07:19,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:19,591 INFO L93 Difference]: Finished difference Result 2552 states and 8397 transitions. [2021-06-05 07:07:19,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 07:07:19,591 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 26 [2021-06-05 07:07:19,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:19,595 INFO L225 Difference]: With dead ends: 2552 [2021-06-05 07:07:19,595 INFO L226 Difference]: Without dead ends: 2527 [2021-06-05 07:07:19,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 511.7ms TimeCoverageRelationStatistics Valid=180, Invalid=632, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:07:19,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2527 states. [2021-06-05 07:07:19,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2527 to 1871. [2021-06-05 07:07:19,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1871 states, 1870 states have (on average 3.36524064171123) internal successors, (6293), 1870 states have internal predecessors, (6293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:19,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 6293 transitions. [2021-06-05 07:07:19,617 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 6293 transitions. Word has length 26 [2021-06-05 07:07:19,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:19,617 INFO L482 AbstractCegarLoop]: Abstraction has 1871 states and 6293 transitions. [2021-06-05 07:07:19,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-06-05 07:07:19,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 6293 transitions. [2021-06-05 07:07:19,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:07:19,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:19,620 INFO L521 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] [2021-06-05 07:07:19,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-06-05 07:07:19,820 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:19,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:19,820 INFO L82 PathProgramCache]: Analyzing trace with hash 243784254, now seen corresponding path program 58 times [2021-06-05 07:07:19,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:19,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324564943] [2021-06-05 07:07:19,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:19,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:19,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:19,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:19,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324564943] [2021-06-05 07:07:19,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324564943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:19,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652636921] [2021-06-05 07:07:19,943 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 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 [2021-06-05 07:07:19,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:07:19,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:19,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 07:07:19,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:20,147 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 07:07:20,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-06-05 07:07:20,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:20,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:20,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:20,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:21 [2021-06-05 07:07:20,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:20,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652636921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:20,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:20,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 07:07:20,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907671852] [2021-06-05 07:07:20,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:07:20,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:20,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:07:20,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:07:20,199 INFO L87 Difference]: Start difference. First operand 1871 states and 6293 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-06-05 07:07:20,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:20,766 INFO L93 Difference]: Finished difference Result 2462 states and 8140 transitions. [2021-06-05 07:07:20,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:07:20,766 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 26 [2021-06-05 07:07:20,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:20,770 INFO L225 Difference]: With dead ends: 2462 [2021-06-05 07:07:20,770 INFO L226 Difference]: Without dead ends: 2447 [2021-06-05 07:07:20,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 432.7ms TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:07:20,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-06-05 07:07:20,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 1865. [2021-06-05 07:07:20,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1865 states, 1864 states have (on average 3.3664163090128754) internal successors, (6275), 1864 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:20,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 6275 transitions. [2021-06-05 07:07:20,792 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 6275 transitions. Word has length 26 [2021-06-05 07:07:20,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:20,792 INFO L482 AbstractCegarLoop]: Abstraction has 1865 states and 6275 transitions. [2021-06-05 07:07:20,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-06-05 07:07:20,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 6275 transitions. [2021-06-05 07:07:20,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:07:20,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:20,794 INFO L521 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] [2021-06-05 07:07:20,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-06-05 07:07:20,995 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:20,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:20,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1210206466, now seen corresponding path program 67 times [2021-06-05 07:07:20,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:20,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102512213] [2021-06-05 07:07:20,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:20,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:21,245 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:21,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:21,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102512213] [2021-06-05 07:07:21,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102512213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:21,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276348411] [2021-06-05 07:07:21,245 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 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 [2021-06-05 07:07:21,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:21,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:07:21,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:21,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:21,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:07:21,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:07:21,426 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 21 treesize of output 11 [2021-06-05 07:07:21,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:21,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:21,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:21,433 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-05 07:07:21,452 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:21,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276348411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:21,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:21,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 07:07:21,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753119219] [2021-06-05 07:07:21,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:07:21,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:21,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:07:21,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:07:21,453 INFO L87 Difference]: Start difference. First operand 1865 states and 6275 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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) [2021-06-05 07:07:22,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:22,219 INFO L93 Difference]: Finished difference Result 2375 states and 7798 transitions. [2021-06-05 07:07:22,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:07:22,219 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 26 [2021-06-05 07:07:22,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:22,223 INFO L225 Difference]: With dead ends: 2375 [2021-06-05 07:07:22,223 INFO L226 Difference]: Without dead ends: 2356 [2021-06-05 07:07:22,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 779.0ms TimeCoverageRelationStatistics Valid=209, Invalid=783, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:07:22,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2021-06-05 07:07:22,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 1855. [2021-06-05 07:07:22,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1855 states, 1854 states have (on average 3.366774541531823) internal successors, (6242), 1854 states have internal predecessors, (6242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:22,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1855 states to 1855 states and 6242 transitions. [2021-06-05 07:07:22,245 INFO L78 Accepts]: Start accepts. Automaton has 1855 states and 6242 transitions. Word has length 26 [2021-06-05 07:07:22,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:22,245 INFO L482 AbstractCegarLoop]: Abstraction has 1855 states and 6242 transitions. [2021-06-05 07:07:22,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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) [2021-06-05 07:07:22,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1855 states and 6242 transitions. [2021-06-05 07:07:22,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:07:22,247 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:22,248 INFO L521 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] [2021-06-05 07:07:22,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2021-06-05 07:07:22,449 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:22,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:22,449 INFO L82 PathProgramCache]: Analyzing trace with hash -89207746, now seen corresponding path program 68 times [2021-06-05 07:07:22,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:22,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85687085] [2021-06-05 07:07:22,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:22,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:22,691 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:22,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:22,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85687085] [2021-06-05 07:07:22,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85687085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:22,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294182520] [2021-06-05 07:07:22,691 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 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 [2021-06-05 07:07:22,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:07:22,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:22,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:07:22,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:22,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:22,895 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-05 07:07:22,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 84 treesize of output 78 [2021-06-05 07:07:22,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:22,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:22,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:22,910 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:90, output treesize:22 [2021-06-05 07:07:22,950 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:22,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294182520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:22,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:22,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 07:07:22,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987906279] [2021-06-05 07:07:22,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:07:22,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:22,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:07:22,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:07:22,951 INFO L87 Difference]: Start difference. First operand 1855 states and 6242 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) [2021-06-05 07:07:23,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:23,819 INFO L93 Difference]: Finished difference Result 2478 states and 8169 transitions. [2021-06-05 07:07:23,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 07:07:23,819 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 [2021-06-05 07:07:23,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:23,823 INFO L225 Difference]: With dead ends: 2478 [2021-06-05 07:07:23,823 INFO L226 Difference]: Without dead ends: 2463 [2021-06-05 07:07:23,823 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 719.1ms TimeCoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:07:23,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2463 states. [2021-06-05 07:07:23,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2463 to 1857. [2021-06-05 07:07:23,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 3.3685344827586206) internal successors, (6252), 1856 states have internal predecessors, (6252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:23,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 6252 transitions. [2021-06-05 07:07:23,847 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 6252 transitions. Word has length 26 [2021-06-05 07:07:23,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:23,848 INFO L482 AbstractCegarLoop]: Abstraction has 1857 states and 6252 transitions. [2021-06-05 07:07:23,848 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) [2021-06-05 07:07:23,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 6252 transitions. [2021-06-05 07:07:23,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:07:23,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:23,850 INFO L521 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] [2021-06-05 07:07:24,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:24,053 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:24,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:24,053 INFO L82 PathProgramCache]: Analyzing trace with hash 503651198, now seen corresponding path program 69 times [2021-06-05 07:07:24,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:24,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395251935] [2021-06-05 07:07:24,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:24,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:24,209 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:24,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:24,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395251935] [2021-06-05 07:07:24,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395251935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:24,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060931545] [2021-06-05 07:07:24,210 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 [2021-06-05 07:07:24,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:07:24,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:24,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:07:24,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:24,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:24,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:24,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:24,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 39 [2021-06-05 07:07:24,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:07:24,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:24,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:24,362 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-06-05 07:07:24,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:24,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060931545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:24,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:24,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 07:07:24,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664084086] [2021-06-05 07:07:24,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:07:24,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:24,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:07:24,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:07:24,401 INFO L87 Difference]: Start difference. First operand 1857 states and 6252 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 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) [2021-06-05 07:07:25,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:25,093 INFO L93 Difference]: Finished difference Result 2626 states and 8587 transitions. [2021-06-05 07:07:25,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:07:25,094 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 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 26 [2021-06-05 07:07:25,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:25,097 INFO L225 Difference]: With dead ends: 2626 [2021-06-05 07:07:25,097 INFO L226 Difference]: Without dead ends: 2596 [2021-06-05 07:07:25,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 636.9ms TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:07:25,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2021-06-05 07:07:25,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 1857. [2021-06-05 07:07:25,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 3.3685344827586206) internal successors, (6252), 1856 states have internal predecessors, (6252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:25,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 6252 transitions. [2021-06-05 07:07:25,121 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 6252 transitions. Word has length 26 [2021-06-05 07:07:25,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:25,121 INFO L482 AbstractCegarLoop]: Abstraction has 1857 states and 6252 transitions. [2021-06-05 07:07:25,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 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) [2021-06-05 07:07:25,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 6252 transitions. [2021-06-05 07:07:25,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:07:25,124 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:25,124 INFO L521 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] [2021-06-05 07:07:25,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2021-06-05 07:07:25,336 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:25,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:25,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1868598568, now seen corresponding path program 59 times [2021-06-05 07:07:25,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:25,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375697839] [2021-06-05 07:07:25,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:25,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:25,376 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:25,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:25,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375697839] [2021-06-05 07:07:25,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375697839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:25,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537341077] [2021-06-05 07:07:25,376 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 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 [2021-06-05 07:07:25,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:07:25,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:25,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:07:25,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:25,507 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:25,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537341077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:25,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:25,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:07:25,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112161086] [2021-06-05 07:07:25,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:07:25,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:25,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:07:25,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:07:25,508 INFO L87 Difference]: Start difference. First operand 1857 states and 6252 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) [2021-06-05 07:07:26,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:26,417 INFO L93 Difference]: Finished difference Result 4803 states and 14780 transitions. [2021-06-05 07:07:26,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 07:07:26,417 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 [2021-06-05 07:07:26,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:26,424 INFO L225 Difference]: With dead ends: 4803 [2021-06-05 07:07:26,424 INFO L226 Difference]: Without dead ends: 4803 [2021-06-05 07:07:26,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 528.2ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 07:07:26,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4803 states. [2021-06-05 07:07:26,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4803 to 2054. [2021-06-05 07:07:26,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2054 states, 2053 states have (on average 3.4305893813930832) internal successors, (7043), 2053 states have internal predecessors, (7043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:26,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 7043 transitions. [2021-06-05 07:07:26,476 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 7043 transitions. Word has length 28 [2021-06-05 07:07:26,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:26,476 INFO L482 AbstractCegarLoop]: Abstraction has 2054 states and 7043 transitions. [2021-06-05 07:07:26,476 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) [2021-06-05 07:07:26,477 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 7043 transitions. [2021-06-05 07:07:26,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:07:26,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:26,479 INFO L521 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] [2021-06-05 07:07:26,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-06-05 07:07:26,679 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:26,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:26,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1450049884, now seen corresponding path program 60 times [2021-06-05 07:07:26,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:26,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224459806] [2021-06-05 07:07:26,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:26,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:26,719 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:26,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:26,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224459806] [2021-06-05 07:07:26,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224459806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:26,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570266273] [2021-06-05 07:07:26,720 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 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 [2021-06-05 07:07:26,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:07:26,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:26,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:07:26,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:26,852 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:26,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570266273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:26,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:26,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 07:07:26,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328770092] [2021-06-05 07:07:26,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:07:26,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:26,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:07:26,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:07:26,853 INFO L87 Difference]: Start difference. First operand 2054 states and 7043 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) [2021-06-05 07:07:28,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:28,056 INFO L93 Difference]: Finished difference Result 6390 states and 19386 transitions. [2021-06-05 07:07:28,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 07:07:28,056 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 [2021-06-05 07:07:28,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:28,064 INFO L225 Difference]: With dead ends: 6390 [2021-06-05 07:07:28,064 INFO L226 Difference]: Without dead ends: 6390 [2021-06-05 07:07:28,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 716.8ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 07:07:28,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6390 states. [2021-06-05 07:07:28,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6390 to 2065. [2021-06-05 07:07:28,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 3.438468992248062) internal successors, (7097), 2064 states have internal predecessors, (7097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:28,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 7097 transitions. [2021-06-05 07:07:28,108 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 7097 transitions. Word has length 28 [2021-06-05 07:07:28,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:28,108 INFO L482 AbstractCegarLoop]: Abstraction has 2065 states and 7097 transitions. [2021-06-05 07:07:28,108 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) [2021-06-05 07:07:28,109 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 7097 transitions. [2021-06-05 07:07:28,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:07:28,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:28,111 INFO L521 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] [2021-06-05 07:07:28,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-06-05 07:07:28,312 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:28,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:28,312 INFO L82 PathProgramCache]: Analyzing trace with hash 2017001964, now seen corresponding path program 61 times [2021-06-05 07:07:28,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:28,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524992264] [2021-06-05 07:07:28,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:28,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:28,362 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:28,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:28,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524992264] [2021-06-05 07:07:28,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524992264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:28,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410372953] [2021-06-05 07:07:28,362 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 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 [2021-06-05 07:07:28,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:28,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:07:28,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:28,491 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:28,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410372953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:28,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:28,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 07:07:28,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214256266] [2021-06-05 07:07:28,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:07:28,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:28,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:07:28,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:07:28,492 INFO L87 Difference]: Start difference. First operand 2065 states and 7097 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) [2021-06-05 07:07:29,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:29,640 INFO L93 Difference]: Finished difference Result 5783 states and 17918 transitions. [2021-06-05 07:07:29,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 07:07:29,640 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 [2021-06-05 07:07:29,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:29,648 INFO L225 Difference]: With dead ends: 5783 [2021-06-05 07:07:29,648 INFO L226 Difference]: Without dead ends: 5783 [2021-06-05 07:07:29,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 707.2ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 07:07:29,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5783 states. [2021-06-05 07:07:29,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5783 to 2013. [2021-06-05 07:07:29,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2013 states, 2012 states have (on average 3.412027833001988) internal successors, (6865), 2012 states have internal predecessors, (6865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:29,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2013 states to 2013 states and 6865 transitions. [2021-06-05 07:07:29,689 INFO L78 Accepts]: Start accepts. Automaton has 2013 states and 6865 transitions. Word has length 28 [2021-06-05 07:07:29,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:29,689 INFO L482 AbstractCegarLoop]: Abstraction has 2013 states and 6865 transitions. [2021-06-05 07:07:29,689 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) [2021-06-05 07:07:29,689 INFO L276 IsEmpty]: Start isEmpty. Operand 2013 states and 6865 transitions. [2021-06-05 07:07:29,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:07:29,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:29,691 INFO L521 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] [2021-06-05 07:07:29,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable323,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:29,913 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:29,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:29,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1095937010, now seen corresponding path program 62 times [2021-06-05 07:07:29,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:29,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205899097] [2021-06-05 07:07:29,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:29,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:29,953 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:29,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:29,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205899097] [2021-06-05 07:07:29,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205899097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:29,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821267596] [2021-06-05 07:07:29,953 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 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 [2021-06-05 07:07:29,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:07:29,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:29,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:07:29,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:30,072 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:30,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821267596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:30,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:30,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:07:30,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081077954] [2021-06-05 07:07:30,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:07:30,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:30,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:07:30,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:07:30,073 INFO L87 Difference]: Start difference. First operand 2013 states and 6865 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) [2021-06-05 07:07:31,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:31,070 INFO L93 Difference]: Finished difference Result 4901 states and 14979 transitions. [2021-06-05 07:07:31,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 07:07:31,073 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 [2021-06-05 07:07:31,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:31,081 INFO L225 Difference]: With dead ends: 4901 [2021-06-05 07:07:31,081 INFO L226 Difference]: Without dead ends: 4901 [2021-06-05 07:07:31,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 617.0ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 07:07:31,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4901 states. [2021-06-05 07:07:31,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4901 to 2023. [2021-06-05 07:07:31,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 2022 states have (on average 3.408011869436202) internal successors, (6891), 2022 states have internal predecessors, (6891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:31,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 6891 transitions. [2021-06-05 07:07:31,129 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 6891 transitions. Word has length 28 [2021-06-05 07:07:31,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:31,129 INFO L482 AbstractCegarLoop]: Abstraction has 2023 states and 6891 transitions. [2021-06-05 07:07:31,129 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) [2021-06-05 07:07:31,129 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 6891 transitions. [2021-06-05 07:07:31,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:07:31,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:31,132 INFO L521 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] [2021-06-05 07:07:31,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:31,332 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:31,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:31,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1989400020, now seen corresponding path program 70 times [2021-06-05 07:07:31,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:31,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793369819] [2021-06-05 07:07:31,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:31,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:31,376 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:31,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:31,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793369819] [2021-06-05 07:07:31,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793369819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:31,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77323494] [2021-06-05 07:07:31,377 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 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 [2021-06-05 07:07:31,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:07:31,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:31,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:07:31,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:31,485 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:31,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77323494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:31,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:31,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 07:07:31,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937794652] [2021-06-05 07:07:31,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:07:31,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:31,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:07:31,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:07:31,485 INFO L87 Difference]: Start difference. First operand 2023 states and 6891 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) [2021-06-05 07:07:32,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:32,052 INFO L93 Difference]: Finished difference Result 4322 states and 13382 transitions. [2021-06-05 07:07:32,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 07:07:32,053 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 [2021-06-05 07:07:32,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:32,058 INFO L225 Difference]: With dead ends: 4322 [2021-06-05 07:07:32,059 INFO L226 Difference]: Without dead ends: 4322 [2021-06-05 07:07:32,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 311.3ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 07:07:32,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4322 states. [2021-06-05 07:07:32,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4322 to 2079. [2021-06-05 07:07:32,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2079 states, 2078 states have (on average 3.3946102021174207) internal successors, (7054), 2078 states have internal predecessors, (7054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:32,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 7054 transitions. [2021-06-05 07:07:32,093 INFO L78 Accepts]: Start accepts. Automaton has 2079 states and 7054 transitions. Word has length 28 [2021-06-05 07:07:32,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:32,093 INFO L482 AbstractCegarLoop]: Abstraction has 2079 states and 7054 transitions. [2021-06-05 07:07:32,093 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) [2021-06-05 07:07:32,094 INFO L276 IsEmpty]: Start isEmpty. Operand 2079 states and 7054 transitions. [2021-06-05 07:07:32,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:07:32,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:32,096 INFO L521 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] [2021-06-05 07:07:32,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2021-06-05 07:07:32,297 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:32,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:32,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1848031388, now seen corresponding path program 63 times [2021-06-05 07:07:32,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:32,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946359743] [2021-06-05 07:07:32,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:32,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:32,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:07:32,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:32,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946359743] [2021-06-05 07:07:32,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946359743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:32,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194712330] [2021-06-05 07:07:32,332 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 [2021-06-05 07:07:32,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:07:32,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:32,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:07:32,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:32,428 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:07:32,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194712330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:32,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:32,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 07:07:32,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455239167] [2021-06-05 07:07:32,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:07:32,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:32,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:07:32,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:07:32,429 INFO L87 Difference]: Start difference. First operand 2079 states and 7054 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) [2021-06-05 07:07:32,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:32,609 INFO L93 Difference]: Finished difference Result 3611 states and 11674 transitions. [2021-06-05 07:07:32,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:07:32,609 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 [2021-06-05 07:07:32,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:32,614 INFO L225 Difference]: With dead ends: 3611 [2021-06-05 07:07:32,614 INFO L226 Difference]: Without dead ends: 3593 [2021-06-05 07:07:32,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:07:32,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3593 states. [2021-06-05 07:07:32,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3593 to 2470. [2021-06-05 07:07:32,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2470 states, 2469 states have (on average 3.4726609963547994) internal successors, (8574), 2469 states have internal predecessors, (8574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:32,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2470 states to 2470 states and 8574 transitions. [2021-06-05 07:07:32,650 INFO L78 Accepts]: Start accepts. Automaton has 2470 states and 8574 transitions. Word has length 28 [2021-06-05 07:07:32,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:32,650 INFO L482 AbstractCegarLoop]: Abstraction has 2470 states and 8574 transitions. [2021-06-05 07:07:32,650 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) [2021-06-05 07:07:32,650 INFO L276 IsEmpty]: Start isEmpty. Operand 2470 states and 8574 transitions. [2021-06-05 07:07:32,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:07:32,653 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:32,653 INFO L521 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] [2021-06-05 07:07:32,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-05 07:07:32,853 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:32,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:32,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1411062680, now seen corresponding path program 64 times [2021-06-05 07:07:32,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:32,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362284885] [2021-06-05 07:07:32,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:32,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:32,885 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:32,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:32,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362284885] [2021-06-05 07:07:32,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362284885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:32,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710228988] [2021-06-05 07:07:32,886 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 [2021-06-05 07:07:32,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:07:32,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:32,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:07:32,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:32,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:32,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710228988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:32,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:32,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 07:07:32,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815284177] [2021-06-05 07:07:32,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:07:32,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:32,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:07:32,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:07:32,988 INFO L87 Difference]: Start difference. First operand 2470 states and 8574 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) [2021-06-05 07:07:33,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:33,548 INFO L93 Difference]: Finished difference Result 4256 states and 13496 transitions. [2021-06-05 07:07:33,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 07:07:33,548 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 [2021-06-05 07:07:33,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:33,554 INFO L225 Difference]: With dead ends: 4256 [2021-06-05 07:07:33,554 INFO L226 Difference]: Without dead ends: 4209 [2021-06-05 07:07:33,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 343.3ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 07:07:33,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4209 states. [2021-06-05 07:07:33,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4209 to 2635. [2021-06-05 07:07:33,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2635 states, 2634 states have (on average 3.4935459377372817) internal successors, (9202), 2634 states have internal predecessors, (9202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:33,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 9202 transitions. [2021-06-05 07:07:33,599 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 9202 transitions. Word has length 28 [2021-06-05 07:07:33,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:33,599 INFO L482 AbstractCegarLoop]: Abstraction has 2635 states and 9202 transitions. [2021-06-05 07:07:33,599 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) [2021-06-05 07:07:33,599 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 9202 transitions. [2021-06-05 07:07:33,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:07:33,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:33,602 INFO L521 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] [2021-06-05 07:07:33,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:33,803 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:33,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:33,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1904037996, now seen corresponding path program 71 times [2021-06-05 07:07:33,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:33,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429850974] [2021-06-05 07:07:33,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:33,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:33,843 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:33,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:33,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429850974] [2021-06-05 07:07:33,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429850974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:33,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981328392] [2021-06-05 07:07:33,843 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 [2021-06-05 07:07:33,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:07:33,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:33,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:07:33,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:33,965 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:33,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981328392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:33,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:33,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 07:07:33,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547259218] [2021-06-05 07:07:33,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:07:33,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:33,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:07:33,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:07:33,966 INFO L87 Difference]: Start difference. First operand 2635 states and 9202 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) [2021-06-05 07:07:34,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:34,377 INFO L93 Difference]: Finished difference Result 5094 states and 16833 transitions. [2021-06-05 07:07:34,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:07:34,377 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 [2021-06-05 07:07:34,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:34,385 INFO L225 Difference]: With dead ends: 5094 [2021-06-05 07:07:34,385 INFO L226 Difference]: Without dead ends: 5007 [2021-06-05 07:07:34,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 313.0ms TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:07:34,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5007 states. [2021-06-05 07:07:34,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5007 to 3294. [2021-06-05 07:07:34,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3294 states, 3293 states have (on average 3.5204980261160035) internal successors, (11593), 3293 states have internal predecessors, (11593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:34,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3294 states to 3294 states and 11593 transitions. [2021-06-05 07:07:34,439 INFO L78 Accepts]: Start accepts. Automaton has 3294 states and 11593 transitions. Word has length 28 [2021-06-05 07:07:34,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:34,439 INFO L482 AbstractCegarLoop]: Abstraction has 3294 states and 11593 transitions. [2021-06-05 07:07:34,439 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) [2021-06-05 07:07:34,439 INFO L276 IsEmpty]: Start isEmpty. Operand 3294 states and 11593 transitions. [2021-06-05 07:07:34,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:07:34,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:34,443 INFO L521 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] [2021-06-05 07:07:34,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable328 [2021-06-05 07:07:34,643 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:34,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:34,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1347815140, now seen corresponding path program 65 times [2021-06-05 07:07:34,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:34,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135132066] [2021-06-05 07:07:34,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:34,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:34,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:34,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:34,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135132066] [2021-06-05 07:07:34,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135132066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:34,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869426803] [2021-06-05 07:07:34,675 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 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 [2021-06-05 07:07:34,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:07:34,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:34,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:07:34,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:34,785 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:34,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869426803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:34,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:34,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 07:07:34,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131730794] [2021-06-05 07:07:34,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:07:34,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:34,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:07:34,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:07:34,786 INFO L87 Difference]: Start difference. First operand 3294 states and 11593 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) [2021-06-05 07:07:35,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:35,432 INFO L93 Difference]: Finished difference Result 5537 states and 17511 transitions. [2021-06-05 07:07:35,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 07:07:35,433 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 [2021-06-05 07:07:35,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:35,440 INFO L225 Difference]: With dead ends: 5537 [2021-06-05 07:07:35,440 INFO L226 Difference]: Without dead ends: 5511 [2021-06-05 07:07:35,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 417.2ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:07:35,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5511 states. [2021-06-05 07:07:35,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5511 to 3312. [2021-06-05 07:07:35,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3312 states, 3311 states have (on average 3.5258230141951072) internal successors, (11674), 3311 states have internal predecessors, (11674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:35,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3312 states to 3312 states and 11674 transitions. [2021-06-05 07:07:35,514 INFO L78 Accepts]: Start accepts. Automaton has 3312 states and 11674 transitions. Word has length 28 [2021-06-05 07:07:35,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:35,514 INFO L482 AbstractCegarLoop]: Abstraction has 3312 states and 11674 transitions. [2021-06-05 07:07:35,514 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) [2021-06-05 07:07:35,514 INFO L276 IsEmpty]: Start isEmpty. Operand 3312 states and 11674 transitions. [2021-06-05 07:07:35,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:07:35,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:35,518 INFO L521 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] [2021-06-05 07:07:35,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:35,718 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:35,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:35,719 INFO L82 PathProgramCache]: Analyzing trace with hash -675402358, now seen corresponding path program 66 times [2021-06-05 07:07:35,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:35,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334285465] [2021-06-05 07:07:35,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:35,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:35,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:35,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:35,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334285465] [2021-06-05 07:07:35,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334285465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:35,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163376417] [2021-06-05 07:07:35,753 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 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 [2021-06-05 07:07:35,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:07:35,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:35,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:07:35,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:35,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:35,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163376417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:35,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:35,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 07:07:35,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192328593] [2021-06-05 07:07:35,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:07:35,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:35,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:07:35,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:07:35,865 INFO L87 Difference]: Start difference. First operand 3312 states and 11674 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) [2021-06-05 07:07:36,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:36,538 INFO L93 Difference]: Finished difference Result 5592 states and 17703 transitions. [2021-06-05 07:07:36,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 07:07:36,538 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 [2021-06-05 07:07:36,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:36,545 INFO L225 Difference]: With dead ends: 5592 [2021-06-05 07:07:36,546 INFO L226 Difference]: Without dead ends: 5561 [2021-06-05 07:07:36,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 425.0ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:07:36,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5561 states. [2021-06-05 07:07:36,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5561 to 3305. [2021-06-05 07:07:36,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3305 states, 3304 states have (on average 3.5320823244552058) internal successors, (11670), 3304 states have internal predecessors, (11670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:36,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3305 states to 3305 states and 11670 transitions. [2021-06-05 07:07:36,607 INFO L78 Accepts]: Start accepts. Automaton has 3305 states and 11670 transitions. Word has length 28 [2021-06-05 07:07:36,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:36,607 INFO L482 AbstractCegarLoop]: Abstraction has 3305 states and 11670 transitions. [2021-06-05 07:07:36,607 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) [2021-06-05 07:07:36,607 INFO L276 IsEmpty]: Start isEmpty. Operand 3305 states and 11670 transitions. [2021-06-05 07:07:36,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:07:36,611 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:36,611 INFO L521 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] [2021-06-05 07:07:36,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable330 [2021-06-05 07:07:36,812 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:36,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:36,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1724201280, now seen corresponding path program 67 times [2021-06-05 07:07:36,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:36,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219563766] [2021-06-05 07:07:36,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:36,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:36,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:36,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:36,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219563766] [2021-06-05 07:07:36,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219563766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:36,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079950256] [2021-06-05 07:07:36,844 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:36,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:36,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:07:36,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:36,964 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:36,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079950256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:36,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:36,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 07:07:36,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710382016] [2021-06-05 07:07:36,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:07:36,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:36,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:07:36,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:07:36,965 INFO L87 Difference]: Start difference. First operand 3305 states and 11670 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) [2021-06-05 07:07:37,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:37,495 INFO L93 Difference]: Finished difference Result 6756 states and 21782 transitions. [2021-06-05 07:07:37,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:07:37,496 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 [2021-06-05 07:07:37,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:37,505 INFO L225 Difference]: With dead ends: 6756 [2021-06-05 07:07:37,506 INFO L226 Difference]: Without dead ends: 6709 [2021-06-05 07:07:37,506 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 303.6ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 07:07:37,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6709 states. [2021-06-05 07:07:37,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6709 to 3468. [2021-06-05 07:07:37,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3468 states, 3467 states have (on average 3.5785982117104123) internal successors, (12407), 3467 states have internal predecessors, (12407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:37,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3468 states to 3468 states and 12407 transitions. [2021-06-05 07:07:37,582 INFO L78 Accepts]: Start accepts. Automaton has 3468 states and 12407 transitions. Word has length 28 [2021-06-05 07:07:37,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:37,582 INFO L482 AbstractCegarLoop]: Abstraction has 3468 states and 12407 transitions. [2021-06-05 07:07:37,582 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) [2021-06-05 07:07:37,582 INFO L276 IsEmpty]: Start isEmpty. Operand 3468 states and 12407 transitions. [2021-06-05 07:07:37,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:07:37,586 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:37,586 INFO L521 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] [2021-06-05 07:07:37,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-06-05 07:07:37,787 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:37,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:37,787 INFO L82 PathProgramCache]: Analyzing trace with hash 359577472, now seen corresponding path program 68 times [2021-06-05 07:07:37,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:37,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571672767] [2021-06-05 07:07:37,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:37,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:37,814 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:07:37,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:37,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571672767] [2021-06-05 07:07:37,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571672767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:37,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232540186] [2021-06-05 07:07:37,815 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 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 [2021-06-05 07:07:37,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:07:37,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:37,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:07:37,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:37,897 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:07:37,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232540186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:37,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:37,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 07:07:37,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721045596] [2021-06-05 07:07:37,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:07:37,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:37,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:07:37,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:07:37,898 INFO L87 Difference]: Start difference. First operand 3468 states and 12407 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) [2021-06-05 07:07:38,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:38,056 INFO L93 Difference]: Finished difference Result 5162 states and 17045 transitions. [2021-06-05 07:07:38,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:07:38,056 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 [2021-06-05 07:07:38,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:38,064 INFO L225 Difference]: With dead ends: 5162 [2021-06-05 07:07:38,064 INFO L226 Difference]: Without dead ends: 5162 [2021-06-05 07:07:38,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 106.8ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:07:38,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5162 states. [2021-06-05 07:07:38,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5162 to 3300. [2021-06-05 07:07:38,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3300 states, 3299 states have (on average 3.5383449530160656) internal successors, (11673), 3299 states have internal predecessors, (11673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:38,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3300 states to 3300 states and 11673 transitions. [2021-06-05 07:07:38,137 INFO L78 Accepts]: Start accepts. Automaton has 3300 states and 11673 transitions. Word has length 28 [2021-06-05 07:07:38,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:38,137 INFO L482 AbstractCegarLoop]: Abstraction has 3300 states and 11673 transitions. [2021-06-05 07:07:38,137 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) [2021-06-05 07:07:38,137 INFO L276 IsEmpty]: Start isEmpty. Operand 3300 states and 11673 transitions. [2021-06-05 07:07:38,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:07:38,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:38,141 INFO L521 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] [2021-06-05 07:07:38,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2021-06-05 07:07:38,342 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:38,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:38,342 INFO L82 PathProgramCache]: Analyzing trace with hash -987104094, now seen corresponding path program 69 times [2021-06-05 07:07:38,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:38,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775083251] [2021-06-05 07:07:38,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:38,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:38,378 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:38,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:38,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775083251] [2021-06-05 07:07:38,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775083251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:38,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620949438] [2021-06-05 07:07:38,379 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 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 [2021-06-05 07:07:38,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 07:07:38,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:38,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:07:38,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:38,490 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:38,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620949438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:38,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:38,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 07:07:38,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528269393] [2021-06-05 07:07:38,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:07:38,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:38,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:07:38,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:07:38,490 INFO L87 Difference]: Start difference. First operand 3300 states and 11673 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) [2021-06-05 07:07:39,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:39,134 INFO L93 Difference]: Finished difference Result 7204 states and 22976 transitions. [2021-06-05 07:07:39,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 07:07:39,135 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 [2021-06-05 07:07:39,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:39,146 INFO L225 Difference]: With dead ends: 7204 [2021-06-05 07:07:39,146 INFO L226 Difference]: Without dead ends: 7204 [2021-06-05 07:07:39,146 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 370.6ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:07:39,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7204 states. [2021-06-05 07:07:39,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7204 to 3330. [2021-06-05 07:07:39,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3330 states, 3329 states have (on average 3.5379993992189847) internal successors, (11778), 3329 states have internal predecessors, (11778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:39,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3330 states to 3330 states and 11778 transitions. [2021-06-05 07:07:39,222 INFO L78 Accepts]: Start accepts. Automaton has 3330 states and 11778 transitions. Word has length 28 [2021-06-05 07:07:39,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:39,222 INFO L482 AbstractCegarLoop]: Abstraction has 3330 states and 11778 transitions. [2021-06-05 07:07:39,222 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) [2021-06-05 07:07:39,222 INFO L276 IsEmpty]: Start isEmpty. Operand 3330 states and 11778 transitions. [2021-06-05 07:07:39,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:07:39,227 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:39,227 INFO L521 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] [2021-06-05 07:07:39,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-05 07:07:39,427 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:39,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:39,427 INFO L82 PathProgramCache]: Analyzing trace with hash -202190000, now seen corresponding path program 70 times [2021-06-05 07:07:39,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:39,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089900611] [2021-06-05 07:07:39,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:39,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:39,460 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:39,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:39,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089900611] [2021-06-05 07:07:39,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089900611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:39,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622375295] [2021-06-05 07:07:39,461 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 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 [2021-06-05 07:07:39,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:07:39,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:39,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:07:39,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:39,594 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:39,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622375295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:39,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:39,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 07:07:39,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208736198] [2021-06-05 07:07:39,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:07:39,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:39,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:07:39,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:07:39,595 INFO L87 Difference]: Start difference. First operand 3330 states and 11778 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) [2021-06-05 07:07:40,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:40,307 INFO L93 Difference]: Finished difference Result 7509 states and 23981 transitions. [2021-06-05 07:07:40,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 07:07:40,308 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 [2021-06-05 07:07:40,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:40,319 INFO L225 Difference]: With dead ends: 7509 [2021-06-05 07:07:40,319 INFO L226 Difference]: Without dead ends: 7509 [2021-06-05 07:07:40,319 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 411.1ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 07:07:40,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7509 states. [2021-06-05 07:07:40,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7509 to 3460. [2021-06-05 07:07:40,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3460 states, 3459 states have (on average 3.5226944203527033) internal successors, (12185), 3459 states have internal predecessors, (12185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:40,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3460 states to 3460 states and 12185 transitions. [2021-06-05 07:07:40,399 INFO L78 Accepts]: Start accepts. Automaton has 3460 states and 12185 transitions. Word has length 28 [2021-06-05 07:07:40,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:40,399 INFO L482 AbstractCegarLoop]: Abstraction has 3460 states and 12185 transitions. [2021-06-05 07:07:40,399 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) [2021-06-05 07:07:40,399 INFO L276 IsEmpty]: Start isEmpty. Operand 3460 states and 12185 transitions. [2021-06-05 07:07:40,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:07:40,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:40,404 INFO L521 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] [2021-06-05 07:07:40,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-06-05 07:07:40,604 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:40,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:40,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1285212656, now seen corresponding path program 71 times [2021-06-05 07:07:40,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:40,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469563097] [2021-06-05 07:07:40,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:40,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:40,652 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:40,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:40,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469563097] [2021-06-05 07:07:40,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469563097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:40,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354508457] [2021-06-05 07:07:40,652 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 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 [2021-06-05 07:07:40,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:07:40,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:40,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:07:40,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:40,760 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:40,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354508457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:40,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:40,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 07:07:40,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761009050] [2021-06-05 07:07:40,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:07:40,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:40,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:07:40,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:07:40,761 INFO L87 Difference]: Start difference. First operand 3460 states and 12185 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) [2021-06-05 07:07:41,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:41,399 INFO L93 Difference]: Finished difference Result 8003 states and 25580 transitions. [2021-06-05 07:07:41,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 07:07:41,399 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 [2021-06-05 07:07:41,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:41,412 INFO L225 Difference]: With dead ends: 8003 [2021-06-05 07:07:41,412 INFO L226 Difference]: Without dead ends: 7990 [2021-06-05 07:07:41,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 372.1ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:07:41,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7990 states. [2021-06-05 07:07:41,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7990 to 4105. [2021-06-05 07:07:41,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4105 states, 4104 states have (on average 3.5689571150097468) internal successors, (14647), 4104 states have internal predecessors, (14647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:41,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4105 states to 4105 states and 14647 transitions. [2021-06-05 07:07:41,504 INFO L78 Accepts]: Start accepts. Automaton has 4105 states and 14647 transitions. Word has length 28 [2021-06-05 07:07:41,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:41,504 INFO L482 AbstractCegarLoop]: Abstraction has 4105 states and 14647 transitions. [2021-06-05 07:07:41,504 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) [2021-06-05 07:07:41,505 INFO L276 IsEmpty]: Start isEmpty. Operand 4105 states and 14647 transitions. [2021-06-05 07:07:41,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:07:41,510 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:41,510 INFO L521 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] [2021-06-05 07:07:41,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-06-05 07:07:41,710 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:41,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:41,711 INFO L82 PathProgramCache]: Analyzing trace with hash 185865462, now seen corresponding path program 72 times [2021-06-05 07:07:41,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:41,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166160396] [2021-06-05 07:07:41,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:41,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:41,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:41,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:41,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166160396] [2021-06-05 07:07:41,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166160396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:41,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425279788] [2021-06-05 07:07:41,745 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 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 [2021-06-05 07:07:41,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:07:41,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:41,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:07:41,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:41,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:41,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425279788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:41,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:41,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 07:07:41,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309708192] [2021-06-05 07:07:41,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:07:41,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:41,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:07:41,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:07:41,841 INFO L87 Difference]: Start difference. First operand 4105 states and 14647 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) [2021-06-05 07:07:42,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:42,414 INFO L93 Difference]: Finished difference Result 8255 states and 26274 transitions. [2021-06-05 07:07:42,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 07:07:42,414 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 [2021-06-05 07:07:42,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:42,426 INFO L225 Difference]: With dead ends: 8255 [2021-06-05 07:07:42,427 INFO L226 Difference]: Without dead ends: 8255 [2021-06-05 07:07:42,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 348.9ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:07:42,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8255 states. [2021-06-05 07:07:42,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8255 to 3852. [2021-06-05 07:07:42,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3852 states, 3851 states have (on average 3.5344066476239937) internal successors, (13611), 3851 states have internal predecessors, (13611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:42,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3852 states to 3852 states and 13611 transitions. [2021-06-05 07:07:42,534 INFO L78 Accepts]: Start accepts. Automaton has 3852 states and 13611 transitions. Word has length 28 [2021-06-05 07:07:42,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:42,534 INFO L482 AbstractCegarLoop]: Abstraction has 3852 states and 13611 transitions. [2021-06-05 07:07:42,534 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) [2021-06-05 07:07:42,534 INFO L276 IsEmpty]: Start isEmpty. Operand 3852 states and 13611 transitions. [2021-06-05 07:07:42,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:07:42,539 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:42,539 INFO L521 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] [2021-06-05 07:07:42,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:42,741 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:42,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:42,741 INFO L82 PathProgramCache]: Analyzing trace with hash -247011142, now seen corresponding path program 73 times [2021-06-05 07:07:42,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:42,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796573598] [2021-06-05 07:07:42,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:42,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:42,775 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:42,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:42,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796573598] [2021-06-05 07:07:42,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796573598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:42,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846367295] [2021-06-05 07:07:42,775 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 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 [2021-06-05 07:07:42,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:42,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:07:42,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:42,867 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:42,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846367295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:42,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:42,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 07:07:42,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841702163] [2021-06-05 07:07:42,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:07:42,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:42,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:07:42,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:07:42,868 INFO L87 Difference]: Start difference. First operand 3852 states and 13611 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) [2021-06-05 07:07:43,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:43,555 INFO L93 Difference]: Finished difference Result 7348 states and 24071 transitions. [2021-06-05 07:07:43,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 07:07:43,555 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 [2021-06-05 07:07:43,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:43,567 INFO L225 Difference]: With dead ends: 7348 [2021-06-05 07:07:43,567 INFO L226 Difference]: Without dead ends: 7344 [2021-06-05 07:07:43,567 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 383.2ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 07:07:43,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7344 states. [2021-06-05 07:07:43,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7344 to 3485. [2021-06-05 07:07:43,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3485 states, 3484 states have (on average 3.577784156142365) internal successors, (12465), 3484 states have internal predecessors, (12465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:43,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3485 states to 3485 states and 12465 transitions. [2021-06-05 07:07:43,648 INFO L78 Accepts]: Start accepts. Automaton has 3485 states and 12465 transitions. Word has length 28 [2021-06-05 07:07:43,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:43,649 INFO L482 AbstractCegarLoop]: Abstraction has 3485 states and 12465 transitions. [2021-06-05 07:07:43,649 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) [2021-06-05 07:07:43,649 INFO L276 IsEmpty]: Start isEmpty. Operand 3485 states and 12465 transitions. [2021-06-05 07:07:43,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:07:43,654 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:43,654 INFO L521 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] [2021-06-05 07:07:43,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-06-05 07:07:43,854 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:43,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:43,854 INFO L82 PathProgramCache]: Analyzing trace with hash -519020332, now seen corresponding path program 74 times [2021-06-05 07:07:43,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:43,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902327370] [2021-06-05 07:07:43,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:43,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:43,889 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:43,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:43,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902327370] [2021-06-05 07:07:43,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902327370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:43,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190293641] [2021-06-05 07:07:43,889 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 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 [2021-06-05 07:07:43,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:07:43,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:43,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:07:43,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:44,018 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:44,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190293641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:44,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:44,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 07:07:44,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935936190] [2021-06-05 07:07:44,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:07:44,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:44,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:07:44,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:07:44,019 INFO L87 Difference]: Start difference. First operand 3485 states and 12465 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) [2021-06-05 07:07:45,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:45,027 INFO L93 Difference]: Finished difference Result 11702 states and 38583 transitions. [2021-06-05 07:07:45,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 07:07:45,027 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 [2021-06-05 07:07:45,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:45,046 INFO L225 Difference]: With dead ends: 11702 [2021-06-05 07:07:45,046 INFO L226 Difference]: Without dead ends: 11702 [2021-06-05 07:07:45,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 577.3ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 07:07:45,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11702 states. [2021-06-05 07:07:45,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11702 to 3776. [2021-06-05 07:07:45,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3776 states, 3775 states have (on average 3.6603973509933776) internal successors, (13818), 3775 states have internal predecessors, (13818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:45,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3776 states to 3776 states and 13818 transitions. [2021-06-05 07:07:45,170 INFO L78 Accepts]: Start accepts. Automaton has 3776 states and 13818 transitions. Word has length 28 [2021-06-05 07:07:45,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:45,170 INFO L482 AbstractCegarLoop]: Abstraction has 3776 states and 13818 transitions. [2021-06-05 07:07:45,170 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) [2021-06-05 07:07:45,170 INFO L276 IsEmpty]: Start isEmpty. Operand 3776 states and 13818 transitions. [2021-06-05 07:07:45,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:07:45,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:45,175 INFO L521 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] [2021-06-05 07:07:45,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2021-06-05 07:07:45,375 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:45,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:45,376 INFO L82 PathProgramCache]: Analyzing trace with hash 47931748, now seen corresponding path program 75 times [2021-06-05 07:07:45,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:45,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171193770] [2021-06-05 07:07:45,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:45,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:45,409 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:45,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:45,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171193770] [2021-06-05 07:07:45,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171193770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:45,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545607026] [2021-06-05 07:07:45,410 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:45,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:07:45,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:45,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:07:45,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:45,527 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:45,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545607026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:45,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:45,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 07:07:45,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133593377] [2021-06-05 07:07:45,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:07:45,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:45,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:07:45,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:07:45,528 INFO L87 Difference]: Start difference. First operand 3776 states and 13818 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) [2021-06-05 07:07:46,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:46,523 INFO L93 Difference]: Finished difference Result 11394 states and 37759 transitions. [2021-06-05 07:07:46,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 07:07:46,524 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 [2021-06-05 07:07:46,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:46,542 INFO L225 Difference]: With dead ends: 11394 [2021-06-05 07:07:46,543 INFO L226 Difference]: Without dead ends: 11394 [2021-06-05 07:07:46,543 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 575.0ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 07:07:46,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11394 states. [2021-06-05 07:07:46,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11394 to 3727. [2021-06-05 07:07:46,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3727 states, 3726 states have (on average 3.640096618357488) internal successors, (13563), 3726 states have internal predecessors, (13563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:46,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3727 states to 3727 states and 13563 transitions. [2021-06-05 07:07:46,656 INFO L78 Accepts]: Start accepts. Automaton has 3727 states and 13563 transitions. Word has length 28 [2021-06-05 07:07:46,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:46,657 INFO L482 AbstractCegarLoop]: Abstraction has 3727 states and 13563 transitions. [2021-06-05 07:07:46,657 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) [2021-06-05 07:07:46,657 INFO L276 IsEmpty]: Start isEmpty. Operand 3727 states and 13563 transitions. [2021-06-05 07:07:46,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:07:46,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:46,661 INFO L521 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] [2021-06-05 07:07:46,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:46,862 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:46,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:46,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1124414110, now seen corresponding path program 76 times [2021-06-05 07:07:46,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:46,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220022239] [2021-06-05 07:07:46,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:46,896 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:46,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:46,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220022239] [2021-06-05 07:07:46,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220022239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:46,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571937452] [2021-06-05 07:07:46,896 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 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 [2021-06-05 07:07:46,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:07:46,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:46,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:07:46,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:47,001 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:47,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571937452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:47,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:47,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 07:07:47,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131923947] [2021-06-05 07:07:47,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:07:47,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:47,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:07:47,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:07:47,002 INFO L87 Difference]: Start difference. First operand 3727 states and 13563 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) [2021-06-05 07:07:47,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:47,878 INFO L93 Difference]: Finished difference Result 10677 states and 34212 transitions. [2021-06-05 07:07:47,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 07:07:47,878 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 [2021-06-05 07:07:47,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:47,894 INFO L225 Difference]: With dead ends: 10677 [2021-06-05 07:07:47,895 INFO L226 Difference]: Without dead ends: 10677 [2021-06-05 07:07:47,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 483.3ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 07:07:47,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10677 states. [2021-06-05 07:07:47,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10677 to 3767. [2021-06-05 07:07:47,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3767 states, 3766 states have (on average 3.6444503451938397) internal successors, (13725), 3766 states have internal predecessors, (13725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:48,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3767 states to 3767 states and 13725 transitions. [2021-06-05 07:07:48,007 INFO L78 Accepts]: Start accepts. Automaton has 3767 states and 13725 transitions. Word has length 28 [2021-06-05 07:07:48,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:48,007 INFO L482 AbstractCegarLoop]: Abstraction has 3767 states and 13725 transitions. [2021-06-05 07:07:48,007 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) [2021-06-05 07:07:48,007 INFO L276 IsEmpty]: Start isEmpty. Operand 3767 states and 13725 transitions. [2021-06-05 07:07:48,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:07:48,012 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:48,012 INFO L521 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] [2021-06-05 07:07:48,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:48,213 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:48,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:48,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1043038022, now seen corresponding path program 77 times [2021-06-05 07:07:48,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:48,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353957077] [2021-06-05 07:07:48,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:48,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:48,248 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:48,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:48,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353957077] [2021-06-05 07:07:48,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353957077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:48,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438541552] [2021-06-05 07:07:48,249 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 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 [2021-06-05 07:07:48,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 07:07:48,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:48,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:07:48,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:48,350 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:48,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438541552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:48,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:48,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 07:07:48,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632258640] [2021-06-05 07:07:48,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:07:48,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:48,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:07:48,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:07:48,350 INFO L87 Difference]: Start difference. First operand 3767 states and 13725 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) [2021-06-05 07:07:49,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:49,197 INFO L93 Difference]: Finished difference Result 10058 states and 32692 transitions. [2021-06-05 07:07:49,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 07:07:49,197 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 [2021-06-05 07:07:49,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:49,213 INFO L225 Difference]: With dead ends: 10058 [2021-06-05 07:07:49,213 INFO L226 Difference]: Without dead ends: 10050 [2021-06-05 07:07:49,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 486.8ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 07:07:49,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10050 states. [2021-06-05 07:07:49,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10050 to 3733. [2021-06-05 07:07:49,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3733 states, 3732 states have (on average 3.6393354769560555) internal successors, (13582), 3732 states have internal predecessors, (13582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:49,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3733 states to 3733 states and 13582 transitions. [2021-06-05 07:07:49,320 INFO L78 Accepts]: Start accepts. Automaton has 3733 states and 13582 transitions. Word has length 28 [2021-06-05 07:07:49,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:49,320 INFO L482 AbstractCegarLoop]: Abstraction has 3733 states and 13582 transitions. [2021-06-05 07:07:49,320 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) [2021-06-05 07:07:49,320 INFO L276 IsEmpty]: Start isEmpty. Operand 3733 states and 13582 transitions. [2021-06-05 07:07:49,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:07:49,325 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:49,325 INFO L521 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] [2021-06-05 07:07:49,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:49,525 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:49,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:49,526 INFO L82 PathProgramCache]: Analyzing trace with hash -112380806, now seen corresponding path program 78 times [2021-06-05 07:07:49,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:49,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468609353] [2021-06-05 07:07:49,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:49,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:49,562 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:49,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:49,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468609353] [2021-06-05 07:07:49,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468609353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:49,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051883855] [2021-06-05 07:07:49,563 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 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 [2021-06-05 07:07:49,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 07:07:49,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:49,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:07:49,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:49,681 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:49,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051883855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:49,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:49,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 07:07:49,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798871763] [2021-06-05 07:07:49,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:07:49,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:49,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:07:49,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:07:49,682 INFO L87 Difference]: Start difference. First operand 3733 states and 13582 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) [2021-06-05 07:07:50,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:50,629 INFO L93 Difference]: Finished difference Result 9657 states and 31573 transitions. [2021-06-05 07:07:50,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 07:07:50,630 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 [2021-06-05 07:07:50,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:50,645 INFO L225 Difference]: With dead ends: 9657 [2021-06-05 07:07:50,645 INFO L226 Difference]: Without dead ends: 9657 [2021-06-05 07:07:50,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 517.1ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 07:07:50,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9657 states. [2021-06-05 07:07:50,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9657 to 3749. [2021-06-05 07:07:50,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3749 states, 3748 states have (on average 3.6408751334044824) internal successors, (13646), 3748 states have internal predecessors, (13646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:50,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3749 states to 3749 states and 13646 transitions. [2021-06-05 07:07:50,743 INFO L78 Accepts]: Start accepts. Automaton has 3749 states and 13646 transitions. Word has length 28 [2021-06-05 07:07:50,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:50,743 INFO L482 AbstractCegarLoop]: Abstraction has 3749 states and 13646 transitions. [2021-06-05 07:07:50,743 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) [2021-06-05 07:07:50,743 INFO L276 IsEmpty]: Start isEmpty. Operand 3749 states and 13646 transitions. [2021-06-05 07:07:50,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:07:50,749 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:50,749 INFO L521 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] [2021-06-05 07:07:50,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2021-06-05 07:07:50,949 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:50,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:50,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1530658348, now seen corresponding path program 79 times [2021-06-05 07:07:50,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:50,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511149051] [2021-06-05 07:07:50,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:50,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:50,982 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:50,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:50,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511149051] [2021-06-05 07:07:50,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511149051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:50,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835199611] [2021-06-05 07:07:50,983 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 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 [2021-06-05 07:07:51,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:51,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:07:51,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:51,092 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:51,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835199611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:51,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:51,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 07:07:51,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986042936] [2021-06-05 07:07:51,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:07:51,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:51,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:07:51,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:07:51,093 INFO L87 Difference]: Start difference. First operand 3749 states and 13646 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) [2021-06-05 07:07:51,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:51,968 INFO L93 Difference]: Finished difference Result 9322 states and 30778 transitions. [2021-06-05 07:07:51,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 07:07:51,968 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 [2021-06-05 07:07:51,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:51,984 INFO L225 Difference]: With dead ends: 9322 [2021-06-05 07:07:51,984 INFO L226 Difference]: Without dead ends: 9314 [2021-06-05 07:07:51,984 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 492.7ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 07:07:51,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9314 states. [2021-06-05 07:07:52,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9314 to 3417. [2021-06-05 07:07:52,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3417 states, 3416 states have (on average 3.55327868852459) internal successors, (12138), 3416 states have internal predecessors, (12138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:52,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3417 states to 3417 states and 12138 transitions. [2021-06-05 07:07:52,096 INFO L78 Accepts]: Start accepts. Automaton has 3417 states and 12138 transitions. Word has length 28 [2021-06-05 07:07:52,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:52,096 INFO L482 AbstractCegarLoop]: Abstraction has 3417 states and 12138 transitions. [2021-06-05 07:07:52,096 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) [2021-06-05 07:07:52,096 INFO L276 IsEmpty]: Start isEmpty. Operand 3417 states and 12138 transitions. [2021-06-05 07:07:52,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:07:52,101 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:52,101 INFO L521 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] [2021-06-05 07:07:52,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-06-05 07:07:52,301 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:52,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:52,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1614061928, now seen corresponding path program 80 times [2021-06-05 07:07:52,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:52,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013897326] [2021-06-05 07:07:52,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:52,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:52,335 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:52,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:52,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013897326] [2021-06-05 07:07:52,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013897326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:52,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003348171] [2021-06-05 07:07:52,336 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 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 [2021-06-05 07:07:52,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:07:52,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:52,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:07:52,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:52,456 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:52,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003348171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:52,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:52,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 07:07:52,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145079689] [2021-06-05 07:07:52,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:07:52,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:52,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:07:52,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:07:52,457 INFO L87 Difference]: Start difference. First operand 3417 states and 12138 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) [2021-06-05 07:07:53,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:53,325 INFO L93 Difference]: Finished difference Result 7074 states and 23087 transitions. [2021-06-05 07:07:53,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 07:07:53,326 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 [2021-06-05 07:07:53,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:53,337 INFO L225 Difference]: With dead ends: 7074 [2021-06-05 07:07:53,337 INFO L226 Difference]: Without dead ends: 7074 [2021-06-05 07:07:53,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 506.5ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 07:07:53,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7074 states. [2021-06-05 07:07:53,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7074 to 3429. [2021-06-05 07:07:53,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3429 states, 3428 states have (on average 3.5519253208868147) internal successors, (12176), 3428 states have internal predecessors, (12176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:53,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3429 states to 3429 states and 12176 transitions. [2021-06-05 07:07:53,414 INFO L78 Accepts]: Start accepts. Automaton has 3429 states and 12176 transitions. Word has length 28 [2021-06-05 07:07:53,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:53,414 INFO L482 AbstractCegarLoop]: Abstraction has 3429 states and 12176 transitions. [2021-06-05 07:07:53,414 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) [2021-06-05 07:07:53,414 INFO L276 IsEmpty]: Start isEmpty. Operand 3429 states and 12176 transitions. [2021-06-05 07:07:53,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:07:53,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:53,418 INFO L521 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] [2021-06-05 07:07:53,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-06-05 07:07:53,619 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:53,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:53,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1027545192, now seen corresponding path program 81 times [2021-06-05 07:07:53,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:53,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404600346] [2021-06-05 07:07:53,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:53,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:53,653 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:53,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:53,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404600346] [2021-06-05 07:07:53,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404600346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:53,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990116546] [2021-06-05 07:07:53,654 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 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 [2021-06-05 07:07:53,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 07:07:53,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:53,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:07:53,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:53,803 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:53,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990116546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:53,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:53,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:07:53,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749497875] [2021-06-05 07:07:53,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:07:53,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:53,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:07:53,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:07:53,804 INFO L87 Difference]: Start difference. First operand 3429 states and 12176 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) [2021-06-05 07:07:54,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:54,897 INFO L93 Difference]: Finished difference Result 8002 states and 25476 transitions. [2021-06-05 07:07:54,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 07:07:54,897 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 [2021-06-05 07:07:54,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:54,910 INFO L225 Difference]: With dead ends: 8002 [2021-06-05 07:07:54,911 INFO L226 Difference]: Without dead ends: 8002 [2021-06-05 07:07:54,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 686.9ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 07:07:54,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8002 states. [2021-06-05 07:07:54,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8002 to 3495. [2021-06-05 07:07:54,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3495 states, 3494 states have (on average 3.546937607326846) internal successors, (12393), 3494 states have internal predecessors, (12393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:55,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3495 states to 3495 states and 12393 transitions. [2021-06-05 07:07:55,003 INFO L78 Accepts]: Start accepts. Automaton has 3495 states and 12393 transitions. Word has length 28 [2021-06-05 07:07:55,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:55,003 INFO L482 AbstractCegarLoop]: Abstraction has 3495 states and 12393 transitions. [2021-06-05 07:07:55,003 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) [2021-06-05 07:07:55,003 INFO L276 IsEmpty]: Start isEmpty. Operand 3495 states and 12393 transitions. [2021-06-05 07:07:55,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:07:55,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:55,010 INFO L521 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] [2021-06-05 07:07:55,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-06-05 07:07:55,233 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:55,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:55,233 INFO L82 PathProgramCache]: Analyzing trace with hash 615493962, now seen corresponding path program 82 times [2021-06-05 07:07:55,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:55,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684433682] [2021-06-05 07:07:55,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:55,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:55,266 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:55,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:55,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684433682] [2021-06-05 07:07:55,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684433682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:55,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518172479] [2021-06-05 07:07:55,267 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 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 [2021-06-05 07:07:55,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:07:55,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:55,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:07:55,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:55,408 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:55,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518172479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:55,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:55,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:07:55,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084344342] [2021-06-05 07:07:55,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:07:55,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:55,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:07:55,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:07:55,409 INFO L87 Difference]: Start difference. First operand 3495 states and 12393 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) [2021-06-05 07:07:56,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:56,401 INFO L93 Difference]: Finished difference Result 7385 states and 23848 transitions. [2021-06-05 07:07:56,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 07:07:56,401 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 [2021-06-05 07:07:56,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:56,413 INFO L225 Difference]: With dead ends: 7385 [2021-06-05 07:07:56,413 INFO L226 Difference]: Without dead ends: 7381 [2021-06-05 07:07:56,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 616.1ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 07:07:56,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7381 states. [2021-06-05 07:07:56,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7381 to 3430. [2021-06-05 07:07:56,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3430 states, 3429 states have (on average 3.5444736074657333) internal successors, (12154), 3429 states have internal predecessors, (12154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:56,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3430 states to 3430 states and 12154 transitions. [2021-06-05 07:07:56,497 INFO L78 Accepts]: Start accepts. Automaton has 3430 states and 12154 transitions. Word has length 28 [2021-06-05 07:07:56,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:56,497 INFO L482 AbstractCegarLoop]: Abstraction has 3430 states and 12154 transitions. [2021-06-05 07:07:56,497 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) [2021-06-05 07:07:56,497 INFO L276 IsEmpty]: Start isEmpty. Operand 3430 states and 12154 transitions. [2021-06-05 07:07:56,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:07:56,502 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:56,502 INFO L521 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] [2021-06-05 07:07:56,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:56,702 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:56,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:56,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1194937186, now seen corresponding path program 72 times [2021-06-05 07:07:56,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:56,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687238065] [2021-06-05 07:07:56,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:56,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:56,749 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:56,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:56,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687238065] [2021-06-05 07:07:56,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687238065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:56,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292502248] [2021-06-05 07:07:56,750 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 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 [2021-06-05 07:07:56,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:07:56,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:56,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:07:56,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:56,864 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:56,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292502248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:56,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:56,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 07:07:56,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639029431] [2021-06-05 07:07:56,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:07:56,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:56,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:07:56,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:07:56,865 INFO L87 Difference]: Start difference. First operand 3430 states and 12154 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) [2021-06-05 07:07:57,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:57,408 INFO L93 Difference]: Finished difference Result 6528 states and 21436 transitions. [2021-06-05 07:07:57,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 07:07:57,408 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 [2021-06-05 07:07:57,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:57,419 INFO L225 Difference]: With dead ends: 6528 [2021-06-05 07:07:57,419 INFO L226 Difference]: Without dead ends: 6528 [2021-06-05 07:07:57,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 328.0ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:07:57,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6528 states. [2021-06-05 07:07:57,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6528 to 3434. [2021-06-05 07:07:57,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 3433 states have (on average 3.5461695310224295) internal successors, (12174), 3433 states have internal predecessors, (12174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:57,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 12174 transitions. [2021-06-05 07:07:57,501 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 12174 transitions. Word has length 28 [2021-06-05 07:07:57,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:57,501 INFO L482 AbstractCegarLoop]: Abstraction has 3434 states and 12174 transitions. [2021-06-05 07:07:57,501 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) [2021-06-05 07:07:57,501 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 12174 transitions. [2021-06-05 07:07:57,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:07:57,506 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:57,506 INFO L521 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] [2021-06-05 07:07:57,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-06-05 07:07:57,706 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:57,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:57,707 INFO L82 PathProgramCache]: Analyzing trace with hash -416862576, now seen corresponding path program 73 times [2021-06-05 07:07:57,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:57,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372162769] [2021-06-05 07:07:57,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:57,745 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:57,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:57,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372162769] [2021-06-05 07:07:57,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372162769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:57,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258401478] [2021-06-05 07:07:57,745 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 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 [2021-06-05 07:07:57,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:57,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:07:57,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:57,862 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:57,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258401478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:57,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:57,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 07:07:57,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252046087] [2021-06-05 07:07:57,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:07:57,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:57,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:07:57,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:07:57,863 INFO L87 Difference]: Start difference. First operand 3434 states and 12174 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) [2021-06-05 07:07:58,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:58,592 INFO L93 Difference]: Finished difference Result 6993 states and 22735 transitions. [2021-06-05 07:07:58,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 07:07:58,593 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 [2021-06-05 07:07:58,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:58,603 INFO L225 Difference]: With dead ends: 6993 [2021-06-05 07:07:58,603 INFO L226 Difference]: Without dead ends: 6993 [2021-06-05 07:07:58,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 429.0ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 07:07:58,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6993 states. [2021-06-05 07:07:58,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6993 to 3448. [2021-06-05 07:07:58,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3448 states, 3447 states have (on average 3.543661154627212) internal successors, (12215), 3447 states have internal predecessors, (12215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:58,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3448 states to 3448 states and 12215 transitions. [2021-06-05 07:07:58,679 INFO L78 Accepts]: Start accepts. Automaton has 3448 states and 12215 transitions. Word has length 28 [2021-06-05 07:07:58,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:58,679 INFO L482 AbstractCegarLoop]: Abstraction has 3448 states and 12215 transitions. [2021-06-05 07:07:58,679 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) [2021-06-05 07:07:58,679 INFO L276 IsEmpty]: Start isEmpty. Operand 3448 states and 12215 transitions. [2021-06-05 07:07:58,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:07:58,683 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:58,683 INFO L521 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] [2021-06-05 07:07:58,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:58,884 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:58,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:58,884 INFO L82 PathProgramCache]: Analyzing trace with hash -648402224, now seen corresponding path program 74 times [2021-06-05 07:07:58,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:58,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506683072] [2021-06-05 07:07:58,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:58,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:58,922 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:58,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:58,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506683072] [2021-06-05 07:07:58,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506683072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:58,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187808317] [2021-06-05 07:07:58,922 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 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 [2021-06-05 07:07:58,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:07:58,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:58,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:07:58,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:59,018 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:59,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187808317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:59,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:59,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 07:07:59,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492275120] [2021-06-05 07:07:59,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:07:59,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:59,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:07:59,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:07:59,019 INFO L87 Difference]: Start difference. First operand 3448 states and 12215 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) [2021-06-05 07:07:59,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:59,821 INFO L93 Difference]: Finished difference Result 7512 states and 24206 transitions. [2021-06-05 07:07:59,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 07:07:59,822 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 [2021-06-05 07:07:59,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:59,833 INFO L225 Difference]: With dead ends: 7512 [2021-06-05 07:07:59,833 INFO L226 Difference]: Without dead ends: 7512 [2021-06-05 07:07:59,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 489.5ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 07:07:59,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7512 states. [2021-06-05 07:07:59,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7512 to 3530. [2021-06-05 07:07:59,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3530 states, 3529 states have (on average 3.537546047038821) internal successors, (12484), 3529 states have internal predecessors, (12484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:59,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3530 states to 3530 states and 12484 transitions. [2021-06-05 07:07:59,915 INFO L78 Accepts]: Start accepts. Automaton has 3530 states and 12484 transitions. Word has length 28 [2021-06-05 07:07:59,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:59,915 INFO L482 AbstractCegarLoop]: Abstraction has 3530 states and 12484 transitions. [2021-06-05 07:07:59,915 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) [2021-06-05 07:07:59,915 INFO L276 IsEmpty]: Start isEmpty. Operand 3530 states and 12484 transitions. [2021-06-05 07:07:59,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:07:59,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:59,919 INFO L521 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] [2021-06-05 07:08:00,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-06-05 07:08:00,120 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:00,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:00,120 INFO L82 PathProgramCache]: Analyzing trace with hash -628686410, now seen corresponding path program 75 times [2021-06-05 07:08:00,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:00,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302521245] [2021-06-05 07:08:00,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:00,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:00,165 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:00,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:00,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302521245] [2021-06-05 07:08:00,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302521245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:00,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7625129] [2021-06-05 07:08:00,166 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 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 [2021-06-05 07:08:00,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 07:08:00,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:00,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:08:00,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:00,279 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:00,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7625129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:00,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:00,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 07:08:00,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962844721] [2021-06-05 07:08:00,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:08:00,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:00,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:08:00,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:08:00,280 INFO L87 Difference]: Start difference. First operand 3530 states and 12484 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) [2021-06-05 07:08:00,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:00,785 INFO L93 Difference]: Finished difference Result 7330 states and 25000 transitions. [2021-06-05 07:08:00,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:08:00,786 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 [2021-06-05 07:08:00,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:00,797 INFO L225 Difference]: With dead ends: 7330 [2021-06-05 07:08:00,797 INFO L226 Difference]: Without dead ends: 7330 [2021-06-05 07:08:00,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 354.1ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:08:00,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7330 states. [2021-06-05 07:08:00,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7330 to 4693. [2021-06-05 07:08:00,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4693 states, 4692 states have (on average 3.6579283887468033) internal successors, (17163), 4692 states have internal predecessors, (17163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:00,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4693 states to 4693 states and 17163 transitions. [2021-06-05 07:08:00,886 INFO L78 Accepts]: Start accepts. Automaton has 4693 states and 17163 transitions. Word has length 28 [2021-06-05 07:08:00,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:00,886 INFO L482 AbstractCegarLoop]: Abstraction has 4693 states and 17163 transitions. [2021-06-05 07:08:00,886 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) [2021-06-05 07:08:00,887 INFO L276 IsEmpty]: Start isEmpty. Operand 4693 states and 17163 transitions. [2021-06-05 07:08:00,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:08:00,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:00,893 INFO L521 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] [2021-06-05 07:08:01,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:01,093 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:01,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:01,093 INFO L82 PathProgramCache]: Analyzing trace with hash -693223366, now seen corresponding path program 76 times [2021-06-05 07:08:01,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:01,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000755893] [2021-06-05 07:08:01,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:01,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:01,133 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:01,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:01,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000755893] [2021-06-05 07:08:01,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000755893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:01,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105204043] [2021-06-05 07:08:01,133 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 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 [2021-06-05 07:08:01,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:08:01,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:01,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:08:01,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:01,226 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:01,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105204043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:01,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:01,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 07:08:01,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753065097] [2021-06-05 07:08:01,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:08:01,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:01,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:08:01,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:08:01,227 INFO L87 Difference]: Start difference. First operand 4693 states and 17163 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) [2021-06-05 07:08:02,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:02,016 INFO L93 Difference]: Finished difference Result 8462 states and 28895 transitions. [2021-06-05 07:08:02,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 07:08:02,017 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 [2021-06-05 07:08:02,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:02,031 INFO L225 Difference]: With dead ends: 8462 [2021-06-05 07:08:02,031 INFO L226 Difference]: Without dead ends: 8458 [2021-06-05 07:08:02,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 433.9ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 07:08:02,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8458 states. [2021-06-05 07:08:02,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8458 to 4583. [2021-06-05 07:08:02,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4583 states, 4582 states have (on average 3.6682671322566565) internal successors, (16808), 4582 states have internal predecessors, (16808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:02,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4583 states to 4583 states and 16808 transitions. [2021-06-05 07:08:02,130 INFO L78 Accepts]: Start accepts. Automaton has 4583 states and 16808 transitions. Word has length 28 [2021-06-05 07:08:02,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:02,130 INFO L482 AbstractCegarLoop]: Abstraction has 4583 states and 16808 transitions. [2021-06-05 07:08:02,130 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) [2021-06-05 07:08:02,130 INFO L276 IsEmpty]: Start isEmpty. Operand 4583 states and 16808 transitions. [2021-06-05 07:08:02,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:08:02,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:02,136 INFO L521 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] [2021-06-05 07:08:02,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable351 [2021-06-05 07:08:02,337 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:02,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:02,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1327034102, now seen corresponding path program 83 times [2021-06-05 07:08:02,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:02,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978865400] [2021-06-05 07:08:02,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:02,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:02,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:02,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:02,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978865400] [2021-06-05 07:08:02,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978865400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:02,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138809467] [2021-06-05 07:08:02,364 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 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 [2021-06-05 07:08:02,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:08:02,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:02,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:08:02,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:02,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:02,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138809467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:02,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:02,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 07:08:02,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739274179] [2021-06-05 07:08:02,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:08:02,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:02,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:08:02,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:08:02,468 INFO L87 Difference]: Start difference. First operand 4583 states and 16808 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) [2021-06-05 07:08:03,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:03,271 INFO L93 Difference]: Finished difference Result 9599 states and 32446 transitions. [2021-06-05 07:08:03,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 07:08:03,272 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 [2021-06-05 07:08:03,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:03,313 INFO L225 Difference]: With dead ends: 9599 [2021-06-05 07:08:03,313 INFO L226 Difference]: Without dead ends: 9587 [2021-06-05 07:08:03,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 451.5ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:08:03,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9587 states. [2021-06-05 07:08:03,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9587 to 5054. [2021-06-05 07:08:03,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5054 states, 5053 states have (on average 3.752226400158322) internal successors, (18960), 5053 states have internal predecessors, (18960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:03,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5054 states to 5054 states and 18960 transitions. [2021-06-05 07:08:03,415 INFO L78 Accepts]: Start accepts. Automaton has 5054 states and 18960 transitions. Word has length 28 [2021-06-05 07:08:03,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:03,415 INFO L482 AbstractCegarLoop]: Abstraction has 5054 states and 18960 transitions. [2021-06-05 07:08:03,415 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) [2021-06-05 07:08:03,415 INFO L276 IsEmpty]: Start isEmpty. Operand 5054 states and 18960 transitions. [2021-06-05 07:08:03,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:08:03,422 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:03,422 INFO L521 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] [2021-06-05 07:08:03,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:03,623 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:03,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:03,623 INFO L82 PathProgramCache]: Analyzing trace with hash -926591794, now seen corresponding path program 84 times [2021-06-05 07:08:03,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:03,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087411256] [2021-06-05 07:08:03,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:03,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:03,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:03,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:03,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087411256] [2021-06-05 07:08:03,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087411256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:03,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625738903] [2021-06-05 07:08:03,650 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 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 [2021-06-05 07:08:03,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:08:03,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:03,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:08:03,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:03,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:03,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625738903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:03,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:03,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 07:08:03,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789979609] [2021-06-05 07:08:03,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:08:03,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:03,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:08:03,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:08:03,755 INFO L87 Difference]: Start difference. First operand 5054 states and 18960 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) [2021-06-05 07:08:04,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:04,535 INFO L93 Difference]: Finished difference Result 9931 states and 33478 transitions. [2021-06-05 07:08:04,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 07:08:04,535 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 [2021-06-05 07:08:04,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:04,552 INFO L225 Difference]: With dead ends: 9931 [2021-06-05 07:08:04,552 INFO L226 Difference]: Without dead ends: 9931 [2021-06-05 07:08:04,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 454.5ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:08:04,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9931 states. [2021-06-05 07:08:04,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9931 to 5074. [2021-06-05 07:08:04,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5074 states, 5073 states have (on average 3.737236349300217) internal successors, (18959), 5073 states have internal predecessors, (18959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:04,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5074 states to 5074 states and 18959 transitions. [2021-06-05 07:08:04,665 INFO L78 Accepts]: Start accepts. Automaton has 5074 states and 18959 transitions. Word has length 28 [2021-06-05 07:08:04,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:04,665 INFO L482 AbstractCegarLoop]: Abstraction has 5074 states and 18959 transitions. [2021-06-05 07:08:04,665 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) [2021-06-05 07:08:04,665 INFO L276 IsEmpty]: Start isEmpty. Operand 5074 states and 18959 transitions. [2021-06-05 07:08:04,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:08:04,673 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:04,673 INFO L521 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] [2021-06-05 07:08:04,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2021-06-05 07:08:04,874 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:04,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:04,875 INFO L82 PathProgramCache]: Analyzing trace with hash -2129998084, now seen corresponding path program 85 times [2021-06-05 07:08:04,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:04,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235865541] [2021-06-05 07:08:04,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:04,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:04,905 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:04,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:04,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235865541] [2021-06-05 07:08:04,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235865541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:04,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742891126] [2021-06-05 07:08:04,906 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 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 [2021-06-05 07:08:04,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:04,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:08:04,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:04,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:04,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742891126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:04,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:04,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 07:08:04,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830100449] [2021-06-05 07:08:04,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:08:04,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:04,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:08:04,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:08:04,987 INFO L87 Difference]: Start difference. First operand 5074 states and 18959 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) [2021-06-05 07:08:05,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:05,393 INFO L93 Difference]: Finished difference Result 9404 states and 33475 transitions. [2021-06-05 07:08:05,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:08:05,394 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 [2021-06-05 07:08:05,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:05,411 INFO L225 Difference]: With dead ends: 9404 [2021-06-05 07:08:05,411 INFO L226 Difference]: Without dead ends: 9321 [2021-06-05 07:08:05,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 235.4ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 07:08:05,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9321 states. [2021-06-05 07:08:05,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9321 to 6509. [2021-06-05 07:08:05,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6509 states, 6508 states have (on average 3.785341118623233) internal successors, (24635), 6508 states have internal predecessors, (24635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:05,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6509 states to 6509 states and 24635 transitions. [2021-06-05 07:08:05,540 INFO L78 Accepts]: Start accepts. Automaton has 6509 states and 24635 transitions. Word has length 28 [2021-06-05 07:08:05,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:05,540 INFO L482 AbstractCegarLoop]: Abstraction has 6509 states and 24635 transitions. [2021-06-05 07:08:05,540 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) [2021-06-05 07:08:05,540 INFO L276 IsEmpty]: Start isEmpty. Operand 6509 states and 24635 transitions. [2021-06-05 07:08:05,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:08:05,550 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:05,550 INFO L521 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] [2021-06-05 07:08:05,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable354,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:05,751 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:05,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:05,751 INFO L82 PathProgramCache]: Analyzing trace with hash -921983104, now seen corresponding path program 86 times [2021-06-05 07:08:05,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:05,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187349383] [2021-06-05 07:08:05,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:05,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:05,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:08:05,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:05,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187349383] [2021-06-05 07:08:05,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187349383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:05,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632319633] [2021-06-05 07:08:05,778 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 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 [2021-06-05 07:08:05,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:08:05,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:05,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:08:05,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:05,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:08:05,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632319633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:05,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:05,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 07:08:05,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837729800] [2021-06-05 07:08:05,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:08:05,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:05,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:08:05,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:08:05,854 INFO L87 Difference]: Start difference. First operand 6509 states and 24635 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) [2021-06-05 07:08:06,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:06,029 INFO L93 Difference]: Finished difference Result 8941 states and 31711 transitions. [2021-06-05 07:08:06,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 07:08:06,029 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 [2021-06-05 07:08:06,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:06,044 INFO L225 Difference]: With dead ends: 8941 [2021-06-05 07:08:06,045 INFO L226 Difference]: Without dead ends: 8941 [2021-06-05 07:08:06,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 109.3ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:08:06,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8941 states. [2021-06-05 07:08:06,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8941 to 6655. [2021-06-05 07:08:06,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6655 states, 6654 states have (on average 3.7639014126841) internal successors, (25045), 6654 states have internal predecessors, (25045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:06,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6655 states to 6655 states and 25045 transitions. [2021-06-05 07:08:06,164 INFO L78 Accepts]: Start accepts. Automaton has 6655 states and 25045 transitions. Word has length 28 [2021-06-05 07:08:06,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:06,164 INFO L482 AbstractCegarLoop]: Abstraction has 6655 states and 25045 transitions. [2021-06-05 07:08:06,164 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) [2021-06-05 07:08:06,164 INFO L276 IsEmpty]: Start isEmpty. Operand 6655 states and 25045 transitions. [2021-06-05 07:08:06,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:08:06,174 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:06,174 INFO L521 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] [2021-06-05 07:08:06,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2021-06-05 07:08:06,375 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:06,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:06,375 INFO L82 PathProgramCache]: Analyzing trace with hash 8216640, now seen corresponding path program 87 times [2021-06-05 07:08:06,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:06,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891323919] [2021-06-05 07:08:06,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:06,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:06,413 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:06,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:06,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891323919] [2021-06-05 07:08:06,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891323919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:06,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305855492] [2021-06-05 07:08:06,414 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 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 [2021-06-05 07:08:06,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 07:08:06,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:06,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:08:06,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:06,501 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:06,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305855492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:06,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:06,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 07:08:06,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612743094] [2021-06-05 07:08:06,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:08:06,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:06,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:08:06,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:08:06,502 INFO L87 Difference]: Start difference. First operand 6655 states and 25045 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) [2021-06-05 07:08:07,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:07,206 INFO L93 Difference]: Finished difference Result 13667 states and 47756 transitions. [2021-06-05 07:08:07,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 07:08:07,206 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 [2021-06-05 07:08:07,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:07,232 INFO L225 Difference]: With dead ends: 13667 [2021-06-05 07:08:07,232 INFO L226 Difference]: Without dead ends: 13667 [2021-06-05 07:08:07,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 429.4ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:08:07,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13667 states. [2021-06-05 07:08:07,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13667 to 7331. [2021-06-05 07:08:07,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7331 states, 7330 states have (on average 3.781718963165075) internal successors, (27720), 7330 states have internal predecessors, (27720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:07,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7331 states to 7331 states and 27720 transitions. [2021-06-05 07:08:07,408 INFO L78 Accepts]: Start accepts. Automaton has 7331 states and 27720 transitions. Word has length 28 [2021-06-05 07:08:07,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:07,409 INFO L482 AbstractCegarLoop]: Abstraction has 7331 states and 27720 transitions. [2021-06-05 07:08:07,409 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) [2021-06-05 07:08:07,409 INFO L276 IsEmpty]: Start isEmpty. Operand 7331 states and 27720 transitions. [2021-06-05 07:08:07,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:08:07,419 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:07,419 INFO L521 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] [2021-06-05 07:08:07,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2021-06-05 07:08:07,620 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:07,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:07,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1910896092, now seen corresponding path program 88 times [2021-06-05 07:08:07,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:07,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451020370] [2021-06-05 07:08:07,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:07,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:07,661 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:07,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:07,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451020370] [2021-06-05 07:08:07,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451020370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:07,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727855141] [2021-06-05 07:08:07,662 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 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 [2021-06-05 07:08:07,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:08:07,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:07,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:08:07,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:07,747 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:07,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727855141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:07,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:07,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 07:08:07,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804775496] [2021-06-05 07:08:07,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:08:07,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:07,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:08:07,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:08:07,748 INFO L87 Difference]: Start difference. First operand 7331 states and 27720 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) [2021-06-05 07:08:08,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:08,417 INFO L93 Difference]: Finished difference Result 13813 states and 48320 transitions. [2021-06-05 07:08:08,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 07:08:08,418 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 [2021-06-05 07:08:08,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:08,444 INFO L225 Difference]: With dead ends: 13813 [2021-06-05 07:08:08,444 INFO L226 Difference]: Without dead ends: 13813 [2021-06-05 07:08:08,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 353.2ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:08:08,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13813 states. [2021-06-05 07:08:08,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13813 to 7615. [2021-06-05 07:08:08,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7615 states, 7614 states have (on average 3.7583399001838718) internal successors, (28616), 7614 states have internal predecessors, (28616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:08,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7615 states to 7615 states and 28616 transitions. [2021-06-05 07:08:08,646 INFO L78 Accepts]: Start accepts. Automaton has 7615 states and 28616 transitions. Word has length 28 [2021-06-05 07:08:08,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:08,646 INFO L482 AbstractCegarLoop]: Abstraction has 7615 states and 28616 transitions. [2021-06-05 07:08:08,646 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) [2021-06-05 07:08:08,646 INFO L276 IsEmpty]: Start isEmpty. Operand 7615 states and 28616 transitions. [2021-06-05 07:08:08,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:08:08,658 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:08,658 INFO L521 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] [2021-06-05 07:08:08,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2021-06-05 07:08:08,859 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:08,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:08,859 INFO L82 PathProgramCache]: Analyzing trace with hash 827873436, now seen corresponding path program 89 times [2021-06-05 07:08:08,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:08,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514586425] [2021-06-05 07:08:08,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:08,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:08,888 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:08,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:08,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514586425] [2021-06-05 07:08:08,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514586425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:08,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112527714] [2021-06-05 07:08:08,888 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 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 [2021-06-05 07:08:08,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:08:08,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:08,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:08:08,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:08,970 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:08,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112527714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:08,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:08,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 07:08:08,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076322485] [2021-06-05 07:08:08,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:08:08,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:08,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:08:08,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:08:08,971 INFO L87 Difference]: Start difference. First operand 7615 states and 28616 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) [2021-06-05 07:08:09,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:09,304 INFO L93 Difference]: Finished difference Result 10157 states and 36733 transitions. [2021-06-05 07:08:09,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:08:09,304 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 [2021-06-05 07:08:09,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:09,323 INFO L225 Difference]: With dead ends: 10157 [2021-06-05 07:08:09,323 INFO L226 Difference]: Without dead ends: 10127 [2021-06-05 07:08:09,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 173.2ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:08:09,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10127 states. [2021-06-05 07:08:09,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10127 to 8471. [2021-06-05 07:08:09,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8471 states, 8470 states have (on average 3.7805194805194806) internal successors, (32021), 8470 states have internal predecessors, (32021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:09,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8471 states to 8471 states and 32021 transitions. [2021-06-05 07:08:09,483 INFO L78 Accepts]: Start accepts. Automaton has 8471 states and 32021 transitions. Word has length 28 [2021-06-05 07:08:09,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:09,483 INFO L482 AbstractCegarLoop]: Abstraction has 8471 states and 32021 transitions. [2021-06-05 07:08:09,483 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) [2021-06-05 07:08:09,483 INFO L276 IsEmpty]: Start isEmpty. Operand 8471 states and 32021 transitions. [2021-06-05 07:08:09,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:08:09,496 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:09,496 INFO L521 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] [2021-06-05 07:08:09,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable358,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:09,696 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:09,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:09,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1996015742, now seen corresponding path program 90 times [2021-06-05 07:08:09,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:09,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783588150] [2021-06-05 07:08:09,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:09,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:09,722 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:08:09,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:09,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783588150] [2021-06-05 07:08:09,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783588150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:09,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526734254] [2021-06-05 07:08:09,723 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 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 [2021-06-05 07:08:09,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:08:09,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:09,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:08:09,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:09,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:08:09,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526734254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:09,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:09,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 07:08:09,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85443653] [2021-06-05 07:08:09,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:08:09,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:09,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:08:09,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:08:09,808 INFO L87 Difference]: Start difference. First operand 8471 states and 32021 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) [2021-06-05 07:08:10,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:10,138 INFO L93 Difference]: Finished difference Result 10767 states and 38758 transitions. [2021-06-05 07:08:10,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:08:10,138 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 [2021-06-05 07:08:10,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:10,158 INFO L225 Difference]: With dead ends: 10767 [2021-06-05 07:08:10,158 INFO L226 Difference]: Without dead ends: 10767 [2021-06-05 07:08:10,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 178.1ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:08:10,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10767 states. [2021-06-05 07:08:10,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10767 to 8511. [2021-06-05 07:08:10,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8511 states, 8510 states have (on average 3.7767332549941246) internal successors, (32140), 8510 states have internal predecessors, (32140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:10,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8511 states to 8511 states and 32140 transitions. [2021-06-05 07:08:10,346 INFO L78 Accepts]: Start accepts. Automaton has 8511 states and 32140 transitions. Word has length 28 [2021-06-05 07:08:10,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:10,346 INFO L482 AbstractCegarLoop]: Abstraction has 8511 states and 32140 transitions. [2021-06-05 07:08:10,346 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) [2021-06-05 07:08:10,346 INFO L276 IsEmpty]: Start isEmpty. Operand 8511 states and 32140 transitions. [2021-06-05 07:08:10,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:08:10,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:10,359 INFO L521 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] [2021-06-05 07:08:10,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2021-06-05 07:08:10,559 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:10,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:10,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1866074950, now seen corresponding path program 91 times [2021-06-05 07:08:10,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:10,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548871314] [2021-06-05 07:08:10,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:10,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:10,591 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:08:10,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:10,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548871314] [2021-06-05 07:08:10,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548871314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:10,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870453115] [2021-06-05 07:08:10,591 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 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 [2021-06-05 07:08:10,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:10,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:08:10,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:10,669 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:08:10,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870453115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:10,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:10,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 07:08:10,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201433803] [2021-06-05 07:08:10,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:08:10,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:10,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:08:10,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:08:10,670 INFO L87 Difference]: Start difference. First operand 8511 states and 32140 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) [2021-06-05 07:08:11,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:11,251 INFO L93 Difference]: Finished difference Result 14516 states and 51666 transitions. [2021-06-05 07:08:11,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 07:08:11,251 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 [2021-06-05 07:08:11,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:11,279 INFO L225 Difference]: With dead ends: 14516 [2021-06-05 07:08:11,279 INFO L226 Difference]: Without dead ends: 14512 [2021-06-05 07:08:11,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 308.8ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:08:11,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14512 states. [2021-06-05 07:08:11,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14512 to 8415. [2021-06-05 07:08:11,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8415 states, 8414 states have (on average 3.7803660565723796) internal successors, (31808), 8414 states have internal predecessors, (31808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:11,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8415 states to 8415 states and 31808 transitions. [2021-06-05 07:08:11,470 INFO L78 Accepts]: Start accepts. Automaton has 8415 states and 31808 transitions. Word has length 28 [2021-06-05 07:08:11,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:11,470 INFO L482 AbstractCegarLoop]: Abstraction has 8415 states and 31808 transitions. [2021-06-05 07:08:11,470 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) [2021-06-05 07:08:11,470 INFO L276 IsEmpty]: Start isEmpty. Operand 8415 states and 31808 transitions. [2021-06-05 07:08:11,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:08:11,482 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:11,482 INFO L521 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] [2021-06-05 07:08:11,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:11,683 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:11,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:11,683 INFO L82 PathProgramCache]: Analyzing trace with hash 970254134, now seen corresponding path program 92 times [2021-06-05 07:08:11,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:11,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626088470] [2021-06-05 07:08:11,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:11,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:11,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:11,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:11,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626088470] [2021-06-05 07:08:11,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626088470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:11,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212936259] [2021-06-05 07:08:11,716 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 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 [2021-06-05 07:08:11,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:08:11,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:11,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:08:11,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:11,826 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:11,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212936259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:11,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:11,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 07:08:11,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45941972] [2021-06-05 07:08:11,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:08:11,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:11,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:08:11,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:08:11,827 INFO L87 Difference]: Start difference. First operand 8415 states and 31808 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) [2021-06-05 07:08:12,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:12,293 INFO L93 Difference]: Finished difference Result 10984 states and 39553 transitions. [2021-06-05 07:08:12,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:08:12,293 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 [2021-06-05 07:08:12,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:12,312 INFO L225 Difference]: With dead ends: 10984 [2021-06-05 07:08:12,312 INFO L226 Difference]: Without dead ends: 10984 [2021-06-05 07:08:12,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 243.5ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 07:08:12,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10984 states. [2021-06-05 07:08:12,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10984 to 8331. [2021-06-05 07:08:12,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8331 states, 8330 states have (on average 3.7750300120048017) internal successors, (31446), 8330 states have internal predecessors, (31446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:12,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8331 states to 8331 states and 31446 transitions. [2021-06-05 07:08:12,463 INFO L78 Accepts]: Start accepts. Automaton has 8331 states and 31446 transitions. Word has length 28 [2021-06-05 07:08:12,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:12,463 INFO L482 AbstractCegarLoop]: Abstraction has 8331 states and 31446 transitions. [2021-06-05 07:08:12,463 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) [2021-06-05 07:08:12,463 INFO L276 IsEmpty]: Start isEmpty. Operand 8331 states and 31446 transitions. [2021-06-05 07:08:12,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:08:12,475 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:12,475 INFO L521 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] [2021-06-05 07:08:12,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:12,675 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:12,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:12,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1831555688, now seen corresponding path program 93 times [2021-06-05 07:08:12,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:12,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465734276] [2021-06-05 07:08:12,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:12,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:12,713 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:12,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:12,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465734276] [2021-06-05 07:08:12,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465734276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:12,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430630697] [2021-06-05 07:08:12,714 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 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 [2021-06-05 07:08:12,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 07:08:12,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:12,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:08:12,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:12,794 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:12,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430630697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:12,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:12,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 07:08:12,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651320296] [2021-06-05 07:08:12,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:08:12,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:12,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:08:12,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:08:12,795 INFO L87 Difference]: Start difference. First operand 8331 states and 31446 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) [2021-06-05 07:08:13,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:13,440 INFO L93 Difference]: Finished difference Result 14367 states and 51050 transitions. [2021-06-05 07:08:13,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 07:08:13,441 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 [2021-06-05 07:08:13,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:13,468 INFO L225 Difference]: With dead ends: 14367 [2021-06-05 07:08:13,468 INFO L226 Difference]: Without dead ends: 14355 [2021-06-05 07:08:13,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 355.4ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:08:13,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14355 states. [2021-06-05 07:08:13,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14355 to 8331. [2021-06-05 07:08:13,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8331 states, 8330 states have (on average 3.7740696278511403) internal successors, (31438), 8330 states have internal predecessors, (31438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:13,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8331 states to 8331 states and 31438 transitions. [2021-06-05 07:08:13,652 INFO L78 Accepts]: Start accepts. Automaton has 8331 states and 31438 transitions. Word has length 28 [2021-06-05 07:08:13,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:13,652 INFO L482 AbstractCegarLoop]: Abstraction has 8331 states and 31438 transitions. [2021-06-05 07:08:13,652 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) [2021-06-05 07:08:13,653 INFO L276 IsEmpty]: Start isEmpty. Operand 8331 states and 31438 transitions. [2021-06-05 07:08:13,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:08:13,664 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:13,664 INFO L521 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] [2021-06-05 07:08:13,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:13,865 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:13,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:13,865 INFO L82 PathProgramCache]: Analyzing trace with hash 695130692, now seen corresponding path program 94 times [2021-06-05 07:08:13,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:13,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797454340] [2021-06-05 07:08:13,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:13,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:13,968 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:13,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:13,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797454340] [2021-06-05 07:08:13,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797454340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:13,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565462346] [2021-06-05 07:08:13,968 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 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 [2021-06-05 07:08:13,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:08:13,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:13,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:08:13,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:14,068 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:14,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565462346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:14,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:14,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 07:08:14,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269698570] [2021-06-05 07:08:14,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:08:14,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:14,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:08:14,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:08:14,069 INFO L87 Difference]: Start difference. First operand 8331 states and 31438 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) [2021-06-05 07:08:15,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:15,231 INFO L93 Difference]: Finished difference Result 22154 states and 77423 transitions. [2021-06-05 07:08:15,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 07:08:15,231 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 [2021-06-05 07:08:15,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:15,277 INFO L225 Difference]: With dead ends: 22154 [2021-06-05 07:08:15,277 INFO L226 Difference]: Without dead ends: 22154 [2021-06-05 07:08:15,278 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 675.0ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 07:08:15,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22154 states. [2021-06-05 07:08:15,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22154 to 11512. [2021-06-05 07:08:15,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11512 states, 11511 states have (on average 3.8206063765094256) internal successors, (43979), 11511 states have internal predecessors, (43979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:15,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11512 states to 11512 states and 43979 transitions. [2021-06-05 07:08:15,725 INFO L78 Accepts]: Start accepts. Automaton has 11512 states and 43979 transitions. Word has length 28 [2021-06-05 07:08:15,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:15,726 INFO L482 AbstractCegarLoop]: Abstraction has 11512 states and 43979 transitions. [2021-06-05 07:08:15,726 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) [2021-06-05 07:08:15,726 INFO L276 IsEmpty]: Start isEmpty. Operand 11512 states and 43979 transitions. [2021-06-05 07:08:15,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:08:15,745 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:15,745 INFO L521 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] [2021-06-05 07:08:15,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable363 [2021-06-05 07:08:15,946 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:15,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:15,946 INFO L82 PathProgramCache]: Analyzing trace with hash 776506780, now seen corresponding path program 95 times [2021-06-05 07:08:15,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:15,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609532131] [2021-06-05 07:08:15,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:15,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:15,988 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:15,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:15,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609532131] [2021-06-05 07:08:15,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609532131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:15,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692367567] [2021-06-05 07:08:15,988 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 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 [2021-06-05 07:08:16,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 07:08:16,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:16,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:08:16,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:16,087 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:16,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692367567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:16,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:16,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 07:08:16,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449447061] [2021-06-05 07:08:16,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:08:16,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:16,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:08:16,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:08:16,088 INFO L87 Difference]: Start difference. First operand 11512 states and 43979 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) [2021-06-05 07:08:17,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:17,166 INFO L93 Difference]: Finished difference Result 21281 states and 75167 transitions. [2021-06-05 07:08:17,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 07:08:17,167 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 [2021-06-05 07:08:17,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:17,208 INFO L225 Difference]: With dead ends: 21281 [2021-06-05 07:08:17,208 INFO L226 Difference]: Without dead ends: 21269 [2021-06-05 07:08:17,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 614.3ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 07:08:17,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21269 states. [2021-06-05 07:08:17,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21269 to 11342. [2021-06-05 07:08:17,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11342 states, 11341 states have (on average 3.8255885724362932) internal successors, (43386), 11341 states have internal predecessors, (43386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:17,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11342 states to 11342 states and 43386 transitions. [2021-06-05 07:08:17,527 INFO L78 Accepts]: Start accepts. Automaton has 11342 states and 43386 transitions. Word has length 28 [2021-06-05 07:08:17,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:17,527 INFO L482 AbstractCegarLoop]: Abstraction has 11342 states and 43386 transitions. [2021-06-05 07:08:17,528 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) [2021-06-05 07:08:17,528 INFO L276 IsEmpty]: Start isEmpty. Operand 11342 states and 43386 transitions. [2021-06-05 07:08:17,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:08:17,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:17,544 INFO L521 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] [2021-06-05 07:08:17,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable364,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:17,745 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:17,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:17,745 INFO L82 PathProgramCache]: Analyzing trace with hash -738585192, now seen corresponding path program 96 times [2021-06-05 07:08:17,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:17,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519957702] [2021-06-05 07:08:17,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:17,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:17,783 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:17,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:17,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519957702] [2021-06-05 07:08:17,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519957702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:17,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628742774] [2021-06-05 07:08:17,784 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 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 [2021-06-05 07:08:17,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 07:08:17,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:17,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:08:17,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:17,875 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:17,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628742774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:17,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:17,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 07:08:17,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260352391] [2021-06-05 07:08:17,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:08:17,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:17,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:08:17,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:08:17,876 INFO L87 Difference]: Start difference. First operand 11342 states and 43386 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) [2021-06-05 07:08:18,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:18,907 INFO L93 Difference]: Finished difference Result 21160 states and 74599 transitions. [2021-06-05 07:08:18,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 07:08:18,907 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 [2021-06-05 07:08:18,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:18,948 INFO L225 Difference]: With dead ends: 21160 [2021-06-05 07:08:18,948 INFO L226 Difference]: Without dead ends: 21124 [2021-06-05 07:08:18,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 589.1ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 07:08:18,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21124 states. [2021-06-05 07:08:19,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21124 to 11386. [2021-06-05 07:08:19,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11386 states, 11385 states have (on average 3.824681598594642) internal successors, (43544), 11385 states have internal predecessors, (43544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:19,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11386 states to 11386 states and 43544 transitions. [2021-06-05 07:08:19,262 INFO L78 Accepts]: Start accepts. Automaton has 11386 states and 43544 transitions. Word has length 28 [2021-06-05 07:08:19,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:19,262 INFO L482 AbstractCegarLoop]: Abstraction has 11386 states and 43544 transitions. [2021-06-05 07:08:19,262 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) [2021-06-05 07:08:19,262 INFO L276 IsEmpty]: Start isEmpty. Operand 11386 states and 43544 transitions. [2021-06-05 07:08:19,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:08:19,279 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:19,279 INFO L521 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] [2021-06-05 07:08:19,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-06-05 07:08:19,480 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:19,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:19,480 INFO L82 PathProgramCache]: Analyzing trace with hash 858541524, now seen corresponding path program 97 times [2021-06-05 07:08:19,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:19,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931606577] [2021-06-05 07:08:19,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:19,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:19,519 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:19,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:19,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931606577] [2021-06-05 07:08:19,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931606577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:19,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461755390] [2021-06-05 07:08:19,520 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 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 [2021-06-05 07:08:19,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:19,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:08:19,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:19,634 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:19,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461755390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:19,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:19,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 07:08:19,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621462961] [2021-06-05 07:08:19,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:08:19,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:19,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:08:19,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:08:19,635 INFO L87 Difference]: Start difference. First operand 11386 states and 43544 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) [2021-06-05 07:08:21,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:21,025 INFO L93 Difference]: Finished difference Result 20907 states and 73951 transitions. [2021-06-05 07:08:21,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 07:08:21,025 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 [2021-06-05 07:08:21,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:21,064 INFO L225 Difference]: With dead ends: 20907 [2021-06-05 07:08:21,064 INFO L226 Difference]: Without dead ends: 20907 [2021-06-05 07:08:21,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2649 ImplicationChecksByTransitivity, 890.0ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 07:08:21,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20907 states. [2021-06-05 07:08:21,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20907 to 11582. [2021-06-05 07:08:21,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11582 states, 11581 states have (on average 3.8160780588895604) internal successors, (44194), 11581 states have internal predecessors, (44194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:21,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11582 states to 11582 states and 44194 transitions. [2021-06-05 07:08:21,345 INFO L78 Accepts]: Start accepts. Automaton has 11582 states and 44194 transitions. Word has length 28 [2021-06-05 07:08:21,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:21,345 INFO L482 AbstractCegarLoop]: Abstraction has 11582 states and 44194 transitions. [2021-06-05 07:08:21,345 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) [2021-06-05 07:08:21,345 INFO L276 IsEmpty]: Start isEmpty. Operand 11582 states and 44194 transitions. [2021-06-05 07:08:21,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:08:21,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:21,362 INFO L521 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] [2021-06-05 07:08:21,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-05 07:08:21,562 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:21,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:21,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1793386618, now seen corresponding path program 98 times [2021-06-05 07:08:21,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:21,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386329675] [2021-06-05 07:08:21,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:21,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:21,600 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:21,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:21,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386329675] [2021-06-05 07:08:21,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386329675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:21,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563392376] [2021-06-05 07:08:21,601 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 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 [2021-06-05 07:08:21,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:08:21,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:21,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:08:21,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:21,711 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:21,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563392376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:21,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:21,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 07:08:21,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236938826] [2021-06-05 07:08:21,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:08:21,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:21,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:08:21,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:08:21,712 INFO L87 Difference]: Start difference. First operand 11582 states and 44194 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) [2021-06-05 07:08:22,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:22,941 INFO L93 Difference]: Finished difference Result 20368 states and 72482 transitions. [2021-06-05 07:08:22,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 07:08:22,941 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 [2021-06-05 07:08:22,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:22,980 INFO L225 Difference]: With dead ends: 20368 [2021-06-05 07:08:22,980 INFO L226 Difference]: Without dead ends: 20356 [2021-06-05 07:08:22,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 733.4ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 07:08:22,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20356 states. [2021-06-05 07:08:23,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20356 to 11460. [2021-06-05 07:08:23,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11460 states, 11459 states have (on average 3.8197923029932803) internal successors, (43771), 11459 states have internal predecessors, (43771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:23,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11460 states to 11460 states and 43771 transitions. [2021-06-05 07:08:23,262 INFO L78 Accepts]: Start accepts. Automaton has 11460 states and 43771 transitions. Word has length 28 [2021-06-05 07:08:23,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:23,262 INFO L482 AbstractCegarLoop]: Abstraction has 11460 states and 43771 transitions. [2021-06-05 07:08:23,262 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) [2021-06-05 07:08:23,262 INFO L276 IsEmpty]: Start isEmpty. Operand 11460 states and 43771 transitions. [2021-06-05 07:08:23,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:08:23,279 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:23,279 INFO L521 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] [2021-06-05 07:08:23,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-06-05 07:08:23,479 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:23,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:23,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1234123500, now seen corresponding path program 99 times [2021-06-05 07:08:23,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:23,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972538459] [2021-06-05 07:08:23,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:23,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:23,517 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:23,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:23,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972538459] [2021-06-05 07:08:23,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972538459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:23,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168017869] [2021-06-05 07:08:23,518 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 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 [2021-06-05 07:08:23,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 07:08:23,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:23,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:08:23,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:23,616 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:23,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168017869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:23,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:23,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 07:08:23,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473902564] [2021-06-05 07:08:23,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:08:23,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:23,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:08:23,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:08:23,617 INFO L87 Difference]: Start difference. First operand 11460 states and 43771 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) [2021-06-05 07:08:24,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:24,622 INFO L93 Difference]: Finished difference Result 19606 states and 70387 transitions. [2021-06-05 07:08:24,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 07:08:24,622 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 [2021-06-05 07:08:24,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:24,664 INFO L225 Difference]: With dead ends: 19606 [2021-06-05 07:08:24,664 INFO L226 Difference]: Without dead ends: 19570 [2021-06-05 07:08:24,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1445 ImplicationChecksByTransitivity, 579.3ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 07:08:24,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19570 states. [2021-06-05 07:08:25,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19570 to 11484. [2021-06-05 07:08:25,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11484 states, 11483 states have (on average 3.818775581294087) internal successors, (43851), 11483 states have internal predecessors, (43851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:25,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11484 states to 11484 states and 43851 transitions. [2021-06-05 07:08:25,077 INFO L78 Accepts]: Start accepts. Automaton has 11484 states and 43851 transitions. Word has length 28 [2021-06-05 07:08:25,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:25,077 INFO L482 AbstractCegarLoop]: Abstraction has 11484 states and 43851 transitions. [2021-06-05 07:08:25,077 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) [2021-06-05 07:08:25,078 INFO L276 IsEmpty]: Start isEmpty. Operand 11484 states and 43851 transitions. [2021-06-05 07:08:25,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:08:25,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:25,098 INFO L521 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] [2021-06-05 07:08:25,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable368 [2021-06-05 07:08:25,298 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:25,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:25,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1584729920, now seen corresponding path program 100 times [2021-06-05 07:08:25,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:25,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205575849] [2021-06-05 07:08:25,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:25,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:25,343 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:08:25,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:25,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205575849] [2021-06-05 07:08:25,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205575849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:25,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874176465] [2021-06-05 07:08:25,344 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 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 [2021-06-05 07:08:25,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:08:25,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:25,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:08:25,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:25,495 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:25,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874176465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:25,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:25,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:08:25,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969706456] [2021-06-05 07:08:25,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:08:25,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:25,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:08:25,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:08:25,496 INFO L87 Difference]: Start difference. First operand 11484 states and 43851 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) [2021-06-05 07:08:26,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:26,756 INFO L93 Difference]: Finished difference Result 28641 states and 102323 transitions. [2021-06-05 07:08:26,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 07:08:26,757 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 [2021-06-05 07:08:26,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:26,820 INFO L225 Difference]: With dead ends: 28641 [2021-06-05 07:08:26,820 INFO L226 Difference]: Without dead ends: 28641 [2021-06-05 07:08:26,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 768.6ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 07:08:26,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28641 states. [2021-06-05 07:08:27,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28641 to 11831. [2021-06-05 07:08:27,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11831 states, 11830 states have (on average 3.8459002535925615) internal successors, (45497), 11830 states have internal predecessors, (45497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:27,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11831 states to 11831 states and 45497 transitions. [2021-06-05 07:08:27,304 INFO L78 Accepts]: Start accepts. Automaton has 11831 states and 45497 transitions. Word has length 28 [2021-06-05 07:08:27,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:27,304 INFO L482 AbstractCegarLoop]: Abstraction has 11831 states and 45497 transitions. [2021-06-05 07:08:27,304 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) [2021-06-05 07:08:27,304 INFO L276 IsEmpty]: Start isEmpty. Operand 11831 states and 45497 transitions. [2021-06-05 07:08:27,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:08:27,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:27,321 INFO L521 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] [2021-06-05 07:08:27,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2021-06-05 07:08:27,521 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:27,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:27,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1017777840, now seen corresponding path program 101 times [2021-06-05 07:08:27,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:27,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097325555] [2021-06-05 07:08:27,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:27,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:27,556 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:08:27,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:27,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097325555] [2021-06-05 07:08:27,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097325555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:27,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280871952] [2021-06-05 07:08:27,557 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 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 [2021-06-05 07:08:27,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:08:27,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:27,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:08:27,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:27,684 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:27,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280871952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:27,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:27,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:08:27,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333171797] [2021-06-05 07:08:27,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:08:27,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:27,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:08:27,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:08:27,685 INFO L87 Difference]: Start difference. First operand 11831 states and 45497 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) [2021-06-05 07:08:28,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:28,898 INFO L93 Difference]: Finished difference Result 28095 states and 101100 transitions. [2021-06-05 07:08:28,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 07:08:28,899 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 [2021-06-05 07:08:28,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:28,966 INFO L225 Difference]: With dead ends: 28095 [2021-06-05 07:08:28,966 INFO L226 Difference]: Without dead ends: 28095 [2021-06-05 07:08:28,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 731.5ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 07:08:28,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28095 states. [2021-06-05 07:08:29,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28095 to 11720. [2021-06-05 07:08:29,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11720 states, 11719 states have (on average 3.833176892226299) internal successors, (44921), 11719 states have internal predecessors, (44921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:29,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11720 states to 11720 states and 44921 transitions. [2021-06-05 07:08:29,362 INFO L78 Accepts]: Start accepts. Automaton has 11720 states and 44921 transitions. Word has length 28 [2021-06-05 07:08:29,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:29,362 INFO L482 AbstractCegarLoop]: Abstraction has 11720 states and 44921 transitions. [2021-06-05 07:08:29,362 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) [2021-06-05 07:08:29,363 INFO L276 IsEmpty]: Start isEmpty. Operand 11720 states and 44921 transitions. [2021-06-05 07:08:29,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:08:29,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:29,381 INFO L521 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] [2021-06-05 07:08:29,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable370 [2021-06-05 07:08:29,582 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:29,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:29,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1216329654, now seen corresponding path program 102 times [2021-06-05 07:08:29,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:29,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564501192] [2021-06-05 07:08:29,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:29,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:29,616 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:08:29,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:29,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564501192] [2021-06-05 07:08:29,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564501192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:29,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660216918] [2021-06-05 07:08:29,616 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 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 [2021-06-05 07:08:29,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:08:29,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:29,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:08:29,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:29,733 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:29,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660216918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:29,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:29,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 07:08:29,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950272975] [2021-06-05 07:08:29,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:08:29,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:29,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:08:29,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:08:29,734 INFO L87 Difference]: Start difference. First operand 11720 states and 44921 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) [2021-06-05 07:08:30,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:30,612 INFO L93 Difference]: Finished difference Result 22250 states and 80381 transitions. [2021-06-05 07:08:30,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 07:08:30,613 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 [2021-06-05 07:08:30,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:30,659 INFO L225 Difference]: With dead ends: 22250 [2021-06-05 07:08:30,659 INFO L226 Difference]: Without dead ends: 22250 [2021-06-05 07:08:30,659 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 452.7ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:08:30,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22250 states. [2021-06-05 07:08:30,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22250 to 11729. [2021-06-05 07:08:30,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11729 states, 11728 states have (on average 3.8321964529331516) internal successors, (44944), 11728 states have internal predecessors, (44944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:30,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11729 states to 11729 states and 44944 transitions. [2021-06-05 07:08:30,957 INFO L78 Accepts]: Start accepts. Automaton has 11729 states and 44944 transitions. Word has length 28 [2021-06-05 07:08:30,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:30,957 INFO L482 AbstractCegarLoop]: Abstraction has 11729 states and 44944 transitions. [2021-06-05 07:08:30,957 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) [2021-06-05 07:08:30,957 INFO L276 IsEmpty]: Start isEmpty. Operand 11729 states and 44944 transitions. [2021-06-05 07:08:30,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:08:30,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:30,975 INFO L521 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] [2021-06-05 07:08:31,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:31,175 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:31,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:31,175 INFO L82 PathProgramCache]: Analyzing trace with hash 541607776, now seen corresponding path program 103 times [2021-06-05 07:08:31,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:31,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779117095] [2021-06-05 07:08:31,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:31,209 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:08:31,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:31,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779117095] [2021-06-05 07:08:31,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779117095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:31,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832203816] [2021-06-05 07:08:31,209 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 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 [2021-06-05 07:08:31,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:31,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:08:31,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:31,323 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:31,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832203816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:31,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:31,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 07:08:31,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357365525] [2021-06-05 07:08:31,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:08:31,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:31,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:08:31,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:08:31,324 INFO L87 Difference]: Start difference. First operand 11729 states and 44944 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) [2021-06-05 07:08:32,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:32,083 INFO L93 Difference]: Finished difference Result 20609 states and 75141 transitions. [2021-06-05 07:08:32,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 07:08:32,084 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 [2021-06-05 07:08:32,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:32,125 INFO L225 Difference]: With dead ends: 20609 [2021-06-05 07:08:32,126 INFO L226 Difference]: Without dead ends: 20609 [2021-06-05 07:08:32,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 412.1ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:08:32,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20609 states. [2021-06-05 07:08:32,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20609 to 11741. [2021-06-05 07:08:32,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11741 states, 11740 states have (on average 3.831516183986371) internal successors, (44982), 11740 states have internal predecessors, (44982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:32,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11741 states to 11741 states and 44982 transitions. [2021-06-05 07:08:32,486 INFO L78 Accepts]: Start accepts. Automaton has 11741 states and 44982 transitions. Word has length 28 [2021-06-05 07:08:32,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:32,486 INFO L482 AbstractCegarLoop]: Abstraction has 11741 states and 44982 transitions. [2021-06-05 07:08:32,486 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) [2021-06-05 07:08:32,486 INFO L276 IsEmpty]: Start isEmpty. Operand 11741 states and 44982 transitions. [2021-06-05 07:08:32,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:08:32,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:32,504 INFO L521 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] [2021-06-05 07:08:32,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:32,705 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:32,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:32,705 INFO L82 PathProgramCache]: Analyzing trace with hash -2099999344, now seen corresponding path program 104 times [2021-06-05 07:08:32,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:32,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047154061] [2021-06-05 07:08:32,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:32,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:32,737 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:08:32,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:32,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047154061] [2021-06-05 07:08:32,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047154061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:32,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320569984] [2021-06-05 07:08:32,738 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 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 [2021-06-05 07:08:32,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:08:32,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:32,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:08:32,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:32,859 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:32,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320569984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:32,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:32,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:08:32,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929011005] [2021-06-05 07:08:32,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:08:32,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:32,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:08:32,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:08:32,860 INFO L87 Difference]: Start difference. First operand 11741 states and 44982 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) [2021-06-05 07:08:33,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:33,931 INFO L93 Difference]: Finished difference Result 21392 states and 77378 transitions. [2021-06-05 07:08:33,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 07:08:33,931 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 [2021-06-05 07:08:33,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:33,973 INFO L225 Difference]: With dead ends: 21392 [2021-06-05 07:08:33,973 INFO L226 Difference]: Without dead ends: 21392 [2021-06-05 07:08:33,974 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 663.2ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 07:08:33,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21392 states. [2021-06-05 07:08:34,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21392 to 11849. [2021-06-05 07:08:34,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11849 states, 11848 states have (on average 3.824780553679946) internal successors, (45316), 11848 states have internal predecessors, (45316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:34,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11849 states to 11849 states and 45316 transitions. [2021-06-05 07:08:34,290 INFO L78 Accepts]: Start accepts. Automaton has 11849 states and 45316 transitions. Word has length 28 [2021-06-05 07:08:34,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:34,290 INFO L482 AbstractCegarLoop]: Abstraction has 11849 states and 45316 transitions. [2021-06-05 07:08:34,290 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) [2021-06-05 07:08:34,291 INFO L276 IsEmpty]: Start isEmpty. Operand 11849 states and 45316 transitions. [2021-06-05 07:08:34,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:08:34,308 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:34,308 INFO L521 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] [2021-06-05 07:08:34,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:34,509 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:34,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:34,509 INFO L82 PathProgramCache]: Analyzing trace with hash -456960190, now seen corresponding path program 105 times [2021-06-05 07:08:34,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:34,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341288512] [2021-06-05 07:08:34,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:34,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:34,542 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:08:34,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:34,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341288512] [2021-06-05 07:08:34,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341288512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:34,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526032378] [2021-06-05 07:08:34,542 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 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 [2021-06-05 07:08:34,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 07:08:34,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:34,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:08:34,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:34,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526032378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:34,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:34,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:08:34,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588201125] [2021-06-05 07:08:34,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:08:34,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:34,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:08:34,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:08:34,661 INFO L87 Difference]: Start difference. First operand 11849 states and 45316 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) [2021-06-05 07:08:35,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:35,650 INFO L93 Difference]: Finished difference Result 20773 states and 75674 transitions. [2021-06-05 07:08:35,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 07:08:35,650 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 [2021-06-05 07:08:35,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:35,696 INFO L225 Difference]: With dead ends: 20773 [2021-06-05 07:08:35,696 INFO L226 Difference]: Without dead ends: 20769 [2021-06-05 07:08:35,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 620.2ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 07:08:35,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20769 states. [2021-06-05 07:08:36,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20769 to 11775. [2021-06-05 07:08:36,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11775 states, 11774 states have (on average 3.8285204688296246) internal successors, (45077), 11774 states have internal predecessors, (45077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:36,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11775 states to 11775 states and 45077 transitions. [2021-06-05 07:08:36,074 INFO L78 Accepts]: Start accepts. Automaton has 11775 states and 45077 transitions. Word has length 28 [2021-06-05 07:08:36,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:36,074 INFO L482 AbstractCegarLoop]: Abstraction has 11775 states and 45077 transitions. [2021-06-05 07:08:36,074 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) [2021-06-05 07:08:36,074 INFO L276 IsEmpty]: Start isEmpty. Operand 11775 states and 45077 transitions. [2021-06-05 07:08:36,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:08:36,094 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:36,094 INFO L521 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] [2021-06-05 07:08:36,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:36,295 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:36,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:36,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1748478926, now seen corresponding path program 106 times [2021-06-05 07:08:36,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:36,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853459623] [2021-06-05 07:08:36,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:36,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:36,339 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:36,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:36,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853459623] [2021-06-05 07:08:36,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853459623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:36,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763407478] [2021-06-05 07:08:36,339 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 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 [2021-06-05 07:08:36,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:08:36,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:36,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:08:36,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:36,468 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:36,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763407478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:36,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:36,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:08:36,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817518585] [2021-06-05 07:08:36,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:08:36,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:36,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:08:36,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:08:36,469 INFO L87 Difference]: Start difference. First operand 11775 states and 45077 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) [2021-06-05 07:08:37,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:37,494 INFO L93 Difference]: Finished difference Result 20078 states and 72439 transitions. [2021-06-05 07:08:37,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 07:08:37,494 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 [2021-06-05 07:08:37,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:37,537 INFO L225 Difference]: With dead ends: 20078 [2021-06-05 07:08:37,537 INFO L226 Difference]: Without dead ends: 20078 [2021-06-05 07:08:37,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 655.0ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 07:08:37,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20078 states. [2021-06-05 07:08:37,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20078 to 12002. [2021-06-05 07:08:37,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12002 states, 12001 states have (on average 3.8309307557703525) internal successors, (45975), 12001 states have internal predecessors, (45975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:37,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12002 states to 12002 states and 45975 transitions. [2021-06-05 07:08:37,846 INFO L78 Accepts]: Start accepts. Automaton has 12002 states and 45975 transitions. Word has length 28 [2021-06-05 07:08:37,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:37,846 INFO L482 AbstractCegarLoop]: Abstraction has 12002 states and 45975 transitions. [2021-06-05 07:08:37,846 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) [2021-06-05 07:08:37,846 INFO L276 IsEmpty]: Start isEmpty. Operand 12002 states and 45975 transitions. [2021-06-05 07:08:37,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:08:37,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:37,864 INFO L521 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] [2021-06-05 07:08:38,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-06-05 07:08:38,065 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:38,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:38,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1366168690, now seen corresponding path program 107 times [2021-06-05 07:08:38,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:38,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294357736] [2021-06-05 07:08:38,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:38,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:38,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:38,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294357736] [2021-06-05 07:08:38,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294357736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:38,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438775594] [2021-06-05 07:08:38,104 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 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 [2021-06-05 07:08:38,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 07:08:38,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:38,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:08:38,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:38,215 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:38,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438775594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:38,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:38,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:08:38,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235003002] [2021-06-05 07:08:38,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:08:38,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:38,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:08:38,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:08:38,216 INFO L87 Difference]: Start difference. First operand 12002 states and 45975 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) [2021-06-05 07:08:39,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:39,194 INFO L93 Difference]: Finished difference Result 19609 states and 71148 transitions. [2021-06-05 07:08:39,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 07:08:39,194 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 [2021-06-05 07:08:39,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:39,233 INFO L225 Difference]: With dead ends: 19609 [2021-06-05 07:08:39,233 INFO L226 Difference]: Without dead ends: 19597 [2021-06-05 07:08:39,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 600.4ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 07:08:39,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19597 states. [2021-06-05 07:08:39,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19597 to 12104. [2021-06-05 07:08:39,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12104 states, 12103 states have (on average 3.825332562174667) internal successors, (46298), 12103 states have internal predecessors, (46298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:39,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12104 states to 12104 states and 46298 transitions. [2021-06-05 07:08:39,518 INFO L78 Accepts]: Start accepts. Automaton has 12104 states and 46298 transitions. Word has length 28 [2021-06-05 07:08:39,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:39,518 INFO L482 AbstractCegarLoop]: Abstraction has 12104 states and 46298 transitions. [2021-06-05 07:08:39,518 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) [2021-06-05 07:08:39,518 INFO L276 IsEmpty]: Start isEmpty. Operand 12104 states and 46298 transitions. [2021-06-05 07:08:39,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:08:39,536 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:39,536 INFO L521 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] [2021-06-05 07:08:39,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-06-05 07:08:39,737 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:39,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:39,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1561241668, now seen corresponding path program 77 times [2021-06-05 07:08:39,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:39,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712291937] [2021-06-05 07:08:39,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:39,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:39,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:39,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712291937] [2021-06-05 07:08:39,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712291937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:39,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210780510] [2021-06-05 07:08:39,793 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 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 [2021-06-05 07:08:39,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:08:39,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:39,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:08:39,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:39,882 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:39,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210780510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:39,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:39,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 07:08:39,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017179494] [2021-06-05 07:08:39,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:08:39,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:39,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:08:39,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:08:39,883 INFO L87 Difference]: Start difference. First operand 12104 states and 46298 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) [2021-06-05 07:08:40,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:40,329 INFO L93 Difference]: Finished difference Result 17019 states and 63218 transitions. [2021-06-05 07:08:40,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:08:40,330 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 [2021-06-05 07:08:40,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:40,363 INFO L225 Difference]: With dead ends: 17019 [2021-06-05 07:08:40,364 INFO L226 Difference]: Without dead ends: 17019 [2021-06-05 07:08:40,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 247.3ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:08:40,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17019 states. [2021-06-05 07:08:40,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17019 to 12176. [2021-06-05 07:08:40,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12176 states, 12175 states have (on average 3.820780287474333) internal successors, (46518), 12175 states have internal predecessors, (46518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:40,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12176 states to 12176 states and 46518 transitions. [2021-06-05 07:08:40,612 INFO L78 Accepts]: Start accepts. Automaton has 12176 states and 46518 transitions. Word has length 28 [2021-06-05 07:08:40,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:40,613 INFO L482 AbstractCegarLoop]: Abstraction has 12176 states and 46518 transitions. [2021-06-05 07:08:40,613 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) [2021-06-05 07:08:40,613 INFO L276 IsEmpty]: Start isEmpty. Operand 12176 states and 46518 transitions. [2021-06-05 07:08:40,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:08:40,631 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:40,631 INFO L521 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] [2021-06-05 07:08:40,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-06-05 07:08:40,832 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:40,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:40,832 INFO L82 PathProgramCache]: Analyzing trace with hash 149924120, now seen corresponding path program 78 times [2021-06-05 07:08:40,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:40,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134918873] [2021-06-05 07:08:40,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:40,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:40,863 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:08:40,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:40,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134918873] [2021-06-05 07:08:40,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134918873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:40,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269501242] [2021-06-05 07:08:40,864 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 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 [2021-06-05 07:08:40,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:08:40,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:40,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:08:40,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:40,978 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:40,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269501242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:40,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:40,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 07:08:40,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631311623] [2021-06-05 07:08:40,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:08:40,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:40,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:08:40,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:08:40,979 INFO L87 Difference]: Start difference. First operand 12176 states and 46518 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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) [2021-06-05 07:08:41,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:41,404 INFO L93 Difference]: Finished difference Result 15313 states and 56647 transitions. [2021-06-05 07:08:41,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:08:41,405 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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 [2021-06-05 07:08:41,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:41,436 INFO L225 Difference]: With dead ends: 15313 [2021-06-05 07:08:41,436 INFO L226 Difference]: Without dead ends: 15262 [2021-06-05 07:08:41,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 268.4ms TimeCoverageRelationStatistics Valid=308, Invalid=952, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:08:41,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15262 states. [2021-06-05 07:08:41,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15262 to 11819. [2021-06-05 07:08:41,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11819 states, 11818 states have (on average 3.8123201895413774) internal successors, (45054), 11818 states have internal predecessors, (45054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:41,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11819 states to 11819 states and 45054 transitions. [2021-06-05 07:08:41,753 INFO L78 Accepts]: Start accepts. Automaton has 11819 states and 45054 transitions. Word has length 28 [2021-06-05 07:08:41,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:41,753 INFO L482 AbstractCegarLoop]: Abstraction has 11819 states and 45054 transitions. [2021-06-05 07:08:41,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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) [2021-06-05 07:08:41,753 INFO L276 IsEmpty]: Start isEmpty. Operand 11819 states and 45054 transitions. [2021-06-05 07:08:41,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:08:41,769 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:41,770 INFO L521 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] [2021-06-05 07:08:41,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-05 07:08:41,970 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:41,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:41,970 INFO L82 PathProgramCache]: Analyzing trace with hash 963219036, now seen corresponding path program 79 times [2021-06-05 07:08:41,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:41,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851567492] [2021-06-05 07:08:41,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:41,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:42,003 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:42,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:42,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851567492] [2021-06-05 07:08:42,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851567492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:42,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121903616] [2021-06-05 07:08:42,004 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 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 [2021-06-05 07:08:42,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:42,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:08:42,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:42,089 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:42,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121903616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:42,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:42,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 07:08:42,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923209670] [2021-06-05 07:08:42,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:08:42,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:42,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:08:42,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:08:42,090 INFO L87 Difference]: Start difference. First operand 11819 states and 45054 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) [2021-06-05 07:08:42,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:42,594 INFO L93 Difference]: Finished difference Result 17677 states and 64654 transitions. [2021-06-05 07:08:42,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 07:08:42,594 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 [2021-06-05 07:08:42,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:42,631 INFO L225 Difference]: With dead ends: 17677 [2021-06-05 07:08:42,631 INFO L226 Difference]: Without dead ends: 17677 [2021-06-05 07:08:42,631 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 283.6ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 07:08:42,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17677 states. [2021-06-05 07:08:42,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17677 to 12133. [2021-06-05 07:08:42,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12133 states, 12132 states have (on average 3.7958292120013186) internal successors, (46051), 12132 states have internal predecessors, (46051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:42,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12133 states to 12133 states and 46051 transitions. [2021-06-05 07:08:42,903 INFO L78 Accepts]: Start accepts. Automaton has 12133 states and 46051 transitions. Word has length 28 [2021-06-05 07:08:42,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:42,903 INFO L482 AbstractCegarLoop]: Abstraction has 12133 states and 46051 transitions. [2021-06-05 07:08:42,903 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) [2021-06-05 07:08:42,903 INFO L276 IsEmpty]: Start isEmpty. Operand 12133 states and 46051 transitions. [2021-06-05 07:08:42,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:08:42,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:42,921 INFO L521 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] [2021-06-05 07:08:43,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:43,122 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:43,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:43,122 INFO L82 PathProgramCache]: Analyzing trace with hash -119803620, now seen corresponding path program 80 times [2021-06-05 07:08:43,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:43,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867289662] [2021-06-05 07:08:43,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:43,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:43,154 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:43,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:43,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867289662] [2021-06-05 07:08:43,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867289662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:43,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815701199] [2021-06-05 07:08:43,155 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 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 [2021-06-05 07:08:43,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:08:43,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:43,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:08:43,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:43,274 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:43,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815701199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:43,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:43,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 07:08:43,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916241685] [2021-06-05 07:08:43,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:08:43,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:43,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:08:43,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:08:43,275 INFO L87 Difference]: Start difference. First operand 12133 states and 46051 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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) [2021-06-05 07:08:43,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:43,777 INFO L93 Difference]: Finished difference Result 16906 states and 62799 transitions. [2021-06-05 07:08:43,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:08:43,777 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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 [2021-06-05 07:08:43,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:43,814 INFO L225 Difference]: With dead ends: 16906 [2021-06-05 07:08:43,814 INFO L226 Difference]: Without dead ends: 16896 [2021-06-05 07:08:43,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 305.1ms TimeCoverageRelationStatistics Valid=383, Invalid=1099, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:08:43,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16896 states. [2021-06-05 07:08:44,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16896 to 14164. [2021-06-05 07:08:44,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14164 states, 14163 states have (on average 3.8308268022311656) internal successors, (54256), 14163 states have internal predecessors, (54256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:44,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14164 states to 14164 states and 54256 transitions. [2021-06-05 07:08:44,115 INFO L78 Accepts]: Start accepts. Automaton has 14164 states and 54256 transitions. Word has length 28 [2021-06-05 07:08:44,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:44,115 INFO L482 AbstractCegarLoop]: Abstraction has 14164 states and 54256 transitions. [2021-06-05 07:08:44,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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) [2021-06-05 07:08:44,116 INFO L276 IsEmpty]: Start isEmpty. Operand 14164 states and 54256 transitions. [2021-06-05 07:08:44,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:08:44,138 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:44,138 INFO L521 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] [2021-06-05 07:08:44,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2021-06-05 07:08:44,339 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:44,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:44,339 INFO L82 PathProgramCache]: Analyzing trace with hash 918397894, now seen corresponding path program 81 times [2021-06-05 07:08:44,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:44,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620969790] [2021-06-05 07:08:44,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:44,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:44,372 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:08:44,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:44,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620969790] [2021-06-05 07:08:44,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620969790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:44,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696513717] [2021-06-05 07:08:44,373 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 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 [2021-06-05 07:08:44,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 07:08:44,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:44,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:08:44,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:44,454 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:08:44,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696513717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:44,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:44,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 07:08:44,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222148248] [2021-06-05 07:08:44,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:08:44,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:44,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:08:44,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:08:44,455 INFO L87 Difference]: Start difference. First operand 14164 states and 54256 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) [2021-06-05 07:08:44,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:44,891 INFO L93 Difference]: Finished difference Result 19420 states and 72451 transitions. [2021-06-05 07:08:44,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:08:44,892 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 [2021-06-05 07:08:44,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:44,935 INFO L225 Difference]: With dead ends: 19420 [2021-06-05 07:08:44,935 INFO L226 Difference]: Without dead ends: 19412 [2021-06-05 07:08:44,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 224.1ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:08:45,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19412 states. [2021-06-05 07:08:45,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19412 to 14084. [2021-06-05 07:08:45,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14084 states, 14083 states have (on average 3.8335581907264076) internal successors, (53988), 14083 states have internal predecessors, (53988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:45,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14084 states to 14084 states and 53988 transitions. [2021-06-05 07:08:45,311 INFO L78 Accepts]: Start accepts. Automaton has 14084 states and 53988 transitions. Word has length 28 [2021-06-05 07:08:45,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:45,311 INFO L482 AbstractCegarLoop]: Abstraction has 14084 states and 53988 transitions. [2021-06-05 07:08:45,312 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) [2021-06-05 07:08:45,312 INFO L276 IsEmpty]: Start isEmpty. Operand 14084 states and 53988 transitions. [2021-06-05 07:08:45,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:08:45,335 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:45,335 INFO L521 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] [2021-06-05 07:08:45,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:45,536 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:45,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:45,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1515734552, now seen corresponding path program 82 times [2021-06-05 07:08:45,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:45,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582624518] [2021-06-05 07:08:45,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:45,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:45,576 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:45,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:45,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582624518] [2021-06-05 07:08:45,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582624518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:45,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52803777] [2021-06-05 07:08:45,577 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 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 [2021-06-05 07:08:45,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:08:45,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:45,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:08:45,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:45,658 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:45,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52803777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:45,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:45,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 07:08:45,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987004746] [2021-06-05 07:08:45,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:08:45,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:45,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:08:45,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:08:45,659 INFO L87 Difference]: Start difference. First operand 14084 states and 53988 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) [2021-06-05 07:08:46,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:46,123 INFO L93 Difference]: Finished difference Result 19300 states and 72099 transitions. [2021-06-05 07:08:46,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:08:46,124 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 [2021-06-05 07:08:46,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:46,167 INFO L225 Difference]: With dead ends: 19300 [2021-06-05 07:08:46,167 INFO L226 Difference]: Without dead ends: 19288 [2021-06-05 07:08:46,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 240.7ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:08:46,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19288 states. [2021-06-05 07:08:46,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19288 to 14050. [2021-06-05 07:08:46,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14050 states, 14049 states have (on average 3.835504306356324) internal successors, (53885), 14049 states have internal predecessors, (53885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:46,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14050 states to 14050 states and 53885 transitions. [2021-06-05 07:08:46,492 INFO L78 Accepts]: Start accepts. Automaton has 14050 states and 53885 transitions. Word has length 28 [2021-06-05 07:08:46,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:46,492 INFO L482 AbstractCegarLoop]: Abstraction has 14050 states and 53885 transitions. [2021-06-05 07:08:46,492 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) [2021-06-05 07:08:46,492 INFO L276 IsEmpty]: Start isEmpty. Operand 14050 states and 53885 transitions. [2021-06-05 07:08:46,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:08:46,516 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:46,516 INFO L521 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] [2021-06-05 07:08:46,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,190 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:46,717 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:46,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:46,718 INFO L82 PathProgramCache]: Analyzing trace with hash 860325080, now seen corresponding path program 83 times [2021-06-05 07:08:46,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:46,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657985186] [2021-06-05 07:08:46,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:46,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:46,761 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:08:46,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:46,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657985186] [2021-06-05 07:08:46,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657985186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:46,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340715380] [2021-06-05 07:08:46,762 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 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 [2021-06-05 07:08:46,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:08:46,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:46,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:08:46,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:46,889 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:46,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340715380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:46,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:46,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 07:08:46,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506656545] [2021-06-05 07:08:46,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:08:46,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:46,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:08:46,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:08:46,891 INFO L87 Difference]: Start difference. First operand 14050 states and 53885 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) [2021-06-05 07:08:47,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:47,837 INFO L93 Difference]: Finished difference Result 26192 states and 94663 transitions. [2021-06-05 07:08:47,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 07:08:47,838 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 [2021-06-05 07:08:47,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:47,896 INFO L225 Difference]: With dead ends: 26192 [2021-06-05 07:08:47,896 INFO L226 Difference]: Without dead ends: 26192 [2021-06-05 07:08:47,897 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 510.6ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 07:08:47,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26192 states. [2021-06-05 07:08:48,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26192 to 14026. [2021-06-05 07:08:48,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14026 states, 14025 states have (on average 3.834652406417112) internal successors, (53781), 14025 states have internal predecessors, (53781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:48,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14026 states to 14026 states and 53781 transitions. [2021-06-05 07:08:48,336 INFO L78 Accepts]: Start accepts. Automaton has 14026 states and 53781 transitions. Word has length 28 [2021-06-05 07:08:48,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:48,336 INFO L482 AbstractCegarLoop]: Abstraction has 14026 states and 53781 transitions. [2021-06-05 07:08:48,336 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) [2021-06-05 07:08:48,336 INFO L276 IsEmpty]: Start isEmpty. Operand 14026 states and 53781 transitions. [2021-06-05 07:08:48,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:08:48,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:48,360 INFO L521 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] [2021-06-05 07:08:48,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:48,561 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:48,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:48,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1387096988, now seen corresponding path program 108 times [2021-06-05 07:08:48,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:48,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016937704] [2021-06-05 07:08:48,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:48,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:48,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:08:48,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:48,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016937704] [2021-06-05 07:08:48,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016937704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:48,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348743041] [2021-06-05 07:08:48,594 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 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 [2021-06-05 07:08:48,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:08:48,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:48,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:08:48,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:48,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:48,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348743041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:48,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:48,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 07:08:48,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986987841] [2021-06-05 07:08:48,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:08:48,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:48,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:08:48,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:08:48,712 INFO L87 Difference]: Start difference. First operand 14026 states and 53781 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) [2021-06-05 07:08:49,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:49,391 INFO L93 Difference]: Finished difference Result 21930 states and 80131 transitions. [2021-06-05 07:08:49,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 07:08:49,392 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 [2021-06-05 07:08:49,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:49,434 INFO L225 Difference]: With dead ends: 21930 [2021-06-05 07:08:49,434 INFO L226 Difference]: Without dead ends: 21917 [2021-06-05 07:08:49,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 360.4ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 07:08:49,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21917 states. [2021-06-05 07:08:49,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21917 to 15540. [2021-06-05 07:08:49,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15540 states, 15539 states have (on average 3.8934294356136174) internal successors, (60500), 15539 states have internal predecessors, (60500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:49,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15540 states to 15540 states and 60500 transitions. [2021-06-05 07:08:49,794 INFO L78 Accepts]: Start accepts. Automaton has 15540 states and 60500 transitions. Word has length 28 [2021-06-05 07:08:49,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:49,794 INFO L482 AbstractCegarLoop]: Abstraction has 15540 states and 60500 transitions. [2021-06-05 07:08:49,794 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) [2021-06-05 07:08:49,794 INFO L276 IsEmpty]: Start isEmpty. Operand 15540 states and 60500 transitions. [2021-06-05 07:08:49,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:08:49,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:49,817 INFO L521 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] [2021-06-05 07:08:50,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:50,017 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:50,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:50,018 INFO L82 PathProgramCache]: Analyzing trace with hash 2059509770, now seen corresponding path program 109 times [2021-06-05 07:08:50,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:50,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750644204] [2021-06-05 07:08:50,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:50,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:50,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:08:50,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:50,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750644204] [2021-06-05 07:08:50,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750644204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:50,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615411147] [2021-06-05 07:08:50,045 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 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 [2021-06-05 07:08:50,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:50,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:08:50,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:50,165 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:50,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615411147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:50,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:50,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 07:08:50,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213636929] [2021-06-05 07:08:50,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:08:50,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:50,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:08:50,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:08:50,166 INFO L87 Difference]: Start difference. First operand 15540 states and 60500 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) [2021-06-05 07:08:50,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:50,953 INFO L93 Difference]: Finished difference Result 22091 states and 80578 transitions. [2021-06-05 07:08:50,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 07:08:50,953 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 [2021-06-05 07:08:50,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:50,998 INFO L225 Difference]: With dead ends: 22091 [2021-06-05 07:08:50,998 INFO L226 Difference]: Without dead ends: 22076 [2021-06-05 07:08:50,998 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 429.6ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:08:51,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22076 states. [2021-06-05 07:08:51,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22076 to 15507. [2021-06-05 07:08:51,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15507 states, 15506 states have (on average 3.892428737262995) internal successors, (60356), 15506 states have internal predecessors, (60356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:51,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15507 states to 15507 states and 60356 transitions. [2021-06-05 07:08:51,428 INFO L78 Accepts]: Start accepts. Automaton has 15507 states and 60356 transitions. Word has length 28 [2021-06-05 07:08:51,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:51,429 INFO L482 AbstractCegarLoop]: Abstraction has 15507 states and 60356 transitions. [2021-06-05 07:08:51,429 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) [2021-06-05 07:08:51,429 INFO L276 IsEmpty]: Start isEmpty. Operand 15507 states and 60356 transitions. [2021-06-05 07:08:51,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:08:51,451 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:51,451 INFO L521 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] [2021-06-05 07:08:51,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:51,652 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:51,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:51,652 INFO L82 PathProgramCache]: Analyzing trace with hash 244170948, now seen corresponding path program 110 times [2021-06-05 07:08:51,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:51,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666563898] [2021-06-05 07:08:51,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:51,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:51,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:51,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:51,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666563898] [2021-06-05 07:08:51,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666563898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:51,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929244574] [2021-06-05 07:08:51,678 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 [2021-06-05 07:08:51,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:08:51,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:51,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:08:51,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:51,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:51,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929244574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:51,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:51,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 07:08:51,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672609001] [2021-06-05 07:08:51,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:08:51,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:51,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:08:51,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:08:51,777 INFO L87 Difference]: Start difference. First operand 15507 states and 60356 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) [2021-06-05 07:08:52,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:52,413 INFO L93 Difference]: Finished difference Result 25101 states and 91625 transitions. [2021-06-05 07:08:52,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:08:52,413 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 [2021-06-05 07:08:52,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:52,468 INFO L225 Difference]: With dead ends: 25101 [2021-06-05 07:08:52,468 INFO L226 Difference]: Without dead ends: 25088 [2021-06-05 07:08:52,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 312.8ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:08:52,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25088 states. [2021-06-05 07:08:52,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25088 to 15601. [2021-06-05 07:08:52,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15601 states, 15600 states have (on average 3.8981410256410256) internal successors, (60811), 15600 states have internal predecessors, (60811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:52,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15601 states to 15601 states and 60811 transitions. [2021-06-05 07:08:52,873 INFO L78 Accepts]: Start accepts. Automaton has 15601 states and 60811 transitions. Word has length 28 [2021-06-05 07:08:52,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:52,873 INFO L482 AbstractCegarLoop]: Abstraction has 15601 states and 60811 transitions. [2021-06-05 07:08:52,873 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) [2021-06-05 07:08:52,873 INFO L276 IsEmpty]: Start isEmpty. Operand 15601 states and 60811 transitions. [2021-06-05 07:08:52,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:08:52,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:52,897 INFO L521 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] [2021-06-05 07:08:53,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-06-05 07:08:53,097 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:53,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:53,098 INFO L82 PathProgramCache]: Analyzing trace with hash -438573382, now seen corresponding path program 111 times [2021-06-05 07:08:53,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:53,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915853321] [2021-06-05 07:08:53,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:53,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:53,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:53,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:53,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915853321] [2021-06-05 07:08:53,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915853321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:53,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288815667] [2021-06-05 07:08:53,125 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 [2021-06-05 07:08:53,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:08:53,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:53,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:08:53,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:53,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:53,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288815667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:53,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:53,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 07:08:53,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144900989] [2021-06-05 07:08:53,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:08:53,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:53,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:08:53,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:08:53,228 INFO L87 Difference]: Start difference. First operand 15601 states and 60811 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) [2021-06-05 07:08:53,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:53,933 INFO L93 Difference]: Finished difference Result 26885 states and 97285 transitions. [2021-06-05 07:08:53,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 07:08:53,934 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 [2021-06-05 07:08:53,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:53,997 INFO L225 Difference]: With dead ends: 26885 [2021-06-05 07:08:53,997 INFO L226 Difference]: Without dead ends: 26885 [2021-06-05 07:08:53,997 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 377.3ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:08:54,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26885 states. [2021-06-05 07:08:54,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26885 to 15654. [2021-06-05 07:08:54,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15654 states, 15653 states have (on average 3.894397240145659) internal successors, (60959), 15653 states have internal predecessors, (60959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:54,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15654 states to 15654 states and 60959 transitions. [2021-06-05 07:08:54,570 INFO L78 Accepts]: Start accepts. Automaton has 15654 states and 60959 transitions. Word has length 28 [2021-06-05 07:08:54,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:54,570 INFO L482 AbstractCegarLoop]: Abstraction has 15654 states and 60959 transitions. [2021-06-05 07:08:54,571 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) [2021-06-05 07:08:54,571 INFO L276 IsEmpty]: Start isEmpty. Operand 15654 states and 60959 transitions. [2021-06-05 07:08:54,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:08:54,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:54,596 INFO L521 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] [2021-06-05 07:08:54,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-06-05 07:08:54,797 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:54,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:54,797 INFO L82 PathProgramCache]: Analyzing trace with hash -362417666, now seen corresponding path program 84 times [2021-06-05 07:08:54,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:54,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167102419] [2021-06-05 07:08:54,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:54,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:54,833 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:54,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:54,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167102419] [2021-06-05 07:08:54,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167102419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:54,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536421754] [2021-06-05 07:08:54,833 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 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 [2021-06-05 07:08:54,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 07:08:54,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:54,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:08:54,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:54,943 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:54,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536421754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:54,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:54,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 07:08:54,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922875455] [2021-06-05 07:08:54,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:08:54,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:54,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:08:54,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:08:54,944 INFO L87 Difference]: Start difference. First operand 15654 states and 60959 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) [2021-06-05 07:08:55,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:55,886 INFO L93 Difference]: Finished difference Result 26297 states and 97911 transitions. [2021-06-05 07:08:55,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 07:08:55,887 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 [2021-06-05 07:08:55,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:55,947 INFO L225 Difference]: With dead ends: 26297 [2021-06-05 07:08:55,947 INFO L226 Difference]: Without dead ends: 26293 [2021-06-05 07:08:55,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 524.9ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 07:08:55,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26293 states. [2021-06-05 07:08:56,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26293 to 15950. [2021-06-05 07:08:56,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15950 states, 15949 states have (on average 3.8838171672205153) internal successors, (61943), 15949 states have internal predecessors, (61943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:56,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15950 states to 15950 states and 61943 transitions. [2021-06-05 07:08:56,384 INFO L78 Accepts]: Start accepts. Automaton has 15950 states and 61943 transitions. Word has length 28 [2021-06-05 07:08:56,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:56,384 INFO L482 AbstractCegarLoop]: Abstraction has 15950 states and 61943 transitions. [2021-06-05 07:08:56,384 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) [2021-06-05 07:08:56,384 INFO L276 IsEmpty]: Start isEmpty. Operand 15950 states and 61943 transitions. [2021-06-05 07:08:56,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:08:56,409 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:56,409 INFO L521 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] [2021-06-05 07:08:56,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-05 07:08:56,609 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:56,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:56,610 INFO L82 PathProgramCache]: Analyzing trace with hash 502966272, now seen corresponding path program 112 times [2021-06-05 07:08:56,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:56,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015697243] [2021-06-05 07:08:56,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:56,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:56,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:56,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:56,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015697243] [2021-06-05 07:08:56,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015697243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:56,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927527555] [2021-06-05 07:08:56,640 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 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 [2021-06-05 07:08:56,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:08:56,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:56,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:08:56,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:56,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:56,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927527555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:56,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:56,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 07:08:56,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943401040] [2021-06-05 07:08:56,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:08:56,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:56,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:08:56,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:08:56,732 INFO L87 Difference]: Start difference. First operand 15950 states and 61943 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) [2021-06-05 07:08:57,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:57,369 INFO L93 Difference]: Finished difference Result 23295 states and 86571 transitions. [2021-06-05 07:08:57,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 07:08:57,370 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 [2021-06-05 07:08:57,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:57,421 INFO L225 Difference]: With dead ends: 23295 [2021-06-05 07:08:57,421 INFO L226 Difference]: Without dead ends: 23272 [2021-06-05 07:08:57,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 323.3ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 07:08:57,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23272 states. [2021-06-05 07:08:57,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23272 to 16091. [2021-06-05 07:08:57,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16091 states, 16090 states have (on average 3.89608452454941) internal successors, (62688), 16090 states have internal predecessors, (62688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:57,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16091 states to 16091 states and 62688 transitions. [2021-06-05 07:08:57,856 INFO L78 Accepts]: Start accepts. Automaton has 16091 states and 62688 transitions. Word has length 28 [2021-06-05 07:08:57,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:57,856 INFO L482 AbstractCegarLoop]: Abstraction has 16091 states and 62688 transitions. [2021-06-05 07:08:57,856 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) [2021-06-05 07:08:57,856 INFO L276 IsEmpty]: Start isEmpty. Operand 16091 states and 62688 transitions. [2021-06-05 07:08:57,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:08:57,879 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:57,879 INFO L521 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] [2021-06-05 07:08:58,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-06-05 07:08:58,080 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:58,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:58,080 INFO L82 PathProgramCache]: Analyzing trace with hash -179778058, now seen corresponding path program 113 times [2021-06-05 07:08:58,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:58,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843539071] [2021-06-05 07:08:58,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:58,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:58,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:58,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:58,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843539071] [2021-06-05 07:08:58,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843539071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:58,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301379826] [2021-06-05 07:08:58,110 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 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 [2021-06-05 07:08:58,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:08:58,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:58,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:08:58,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:58,206 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:58,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301379826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:58,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:58,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 07:08:58,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119997261] [2021-06-05 07:08:58,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:08:58,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:58,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:08:58,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:08:58,207 INFO L87 Difference]: Start difference. First operand 16091 states and 62688 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) [2021-06-05 07:08:58,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:58,906 INFO L93 Difference]: Finished difference Result 22857 states and 83754 transitions. [2021-06-05 07:08:58,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 07:08:58,907 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 [2021-06-05 07:08:58,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:58,953 INFO L225 Difference]: With dead ends: 22857 [2021-06-05 07:08:58,953 INFO L226 Difference]: Without dead ends: 22857 [2021-06-05 07:08:58,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 401.5ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:08:58,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22857 states. [2021-06-05 07:08:59,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22857 to 16206. [2021-06-05 07:08:59,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16206 states, 16205 states have (on average 3.8883677877198397) internal successors, (63011), 16205 states have internal predecessors, (63011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:59,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16206 states to 16206 states and 63011 transitions. [2021-06-05 07:08:59,313 INFO L78 Accepts]: Start accepts. Automaton has 16206 states and 63011 transitions. Word has length 28 [2021-06-05 07:08:59,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:59,313 INFO L482 AbstractCegarLoop]: Abstraction has 16206 states and 63011 transitions. [2021-06-05 07:08:59,313 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) [2021-06-05 07:08:59,314 INFO L276 IsEmpty]: Start isEmpty. Operand 16206 states and 63011 transitions. [2021-06-05 07:08:59,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:08:59,336 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:59,336 INFO L521 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] [2021-06-05 07:08:59,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:59,537 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:59,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:59,537 INFO L82 PathProgramCache]: Analyzing trace with hash -499896522, now seen corresponding path program 114 times [2021-06-05 07:08:59,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:59,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610705312] [2021-06-05 07:08:59,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:59,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:59,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:59,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610705312] [2021-06-05 07:08:59,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610705312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:59,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587689897] [2021-06-05 07:08:59,568 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 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 [2021-06-05 07:08:59,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 07:08:59,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:59,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:08:59,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:59,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:59,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587689897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:59,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:59,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 07:08:59,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961944650] [2021-06-05 07:08:59,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:08:59,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:59,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:08:59,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:08:59,679 INFO L87 Difference]: Start difference. First operand 16206 states and 63011 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) [2021-06-05 07:09:00,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:00,347 INFO L93 Difference]: Finished difference Result 25358 states and 93325 transitions. [2021-06-05 07:09:00,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 07:09:00,347 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 [2021-06-05 07:09:00,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:00,403 INFO L225 Difference]: With dead ends: 25358 [2021-06-05 07:09:00,403 INFO L226 Difference]: Without dead ends: 25358 [2021-06-05 07:09:00,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 366.8ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:09:00,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25358 states. [2021-06-05 07:09:00,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25358 to 17371. [2021-06-05 07:09:00,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17371 states, 17370 states have (on average 3.8704663212435233) internal successors, (67230), 17370 states have internal predecessors, (67230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:00,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17371 states to 17371 states and 67230 transitions. [2021-06-05 07:09:00,778 INFO L78 Accepts]: Start accepts. Automaton has 17371 states and 67230 transitions. Word has length 28 [2021-06-05 07:09:00,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:00,778 INFO L482 AbstractCegarLoop]: Abstraction has 17371 states and 67230 transitions. [2021-06-05 07:09:00,778 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) [2021-06-05 07:09:00,778 INFO L276 IsEmpty]: Start isEmpty. Operand 17371 states and 67230 transitions. [2021-06-05 07:09:00,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:09:00,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:00,803 INFO L521 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] [2021-06-05 07:09:01,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:01,003 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:01,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:01,003 INFO L82 PathProgramCache]: Analyzing trace with hash 389506442, now seen corresponding path program 115 times [2021-06-05 07:09:01,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:01,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782965609] [2021-06-05 07:09:01,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:01,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:01,034 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:01,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:01,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782965609] [2021-06-05 07:09:01,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782965609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:01,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730553509] [2021-06-05 07:09:01,034 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 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 [2021-06-05 07:09:01,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:01,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:09:01,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:01,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:01,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730553509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:01,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:01,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 07:09:01,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527854673] [2021-06-05 07:09:01,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:09:01,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:01,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:09:01,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:09:01,249 INFO L87 Difference]: Start difference. First operand 17371 states and 67230 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) [2021-06-05 07:09:02,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:02,130 INFO L93 Difference]: Finished difference Result 28661 states and 104016 transitions. [2021-06-05 07:09:02,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 07:09:02,131 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 [2021-06-05 07:09:02,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:02,199 INFO L225 Difference]: With dead ends: 28661 [2021-06-05 07:09:02,199 INFO L226 Difference]: Without dead ends: 28661 [2021-06-05 07:09:02,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 462.6ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:09:02,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28661 states. [2021-06-05 07:09:02,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28661 to 17617. [2021-06-05 07:09:02,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17617 states, 17616 states have (on average 3.8848773841961854) internal successors, (68436), 17616 states have internal predecessors, (68436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:02,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17617 states to 17617 states and 68436 transitions. [2021-06-05 07:09:02,631 INFO L78 Accepts]: Start accepts. Automaton has 17617 states and 68436 transitions. Word has length 28 [2021-06-05 07:09:02,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:02,631 INFO L482 AbstractCegarLoop]: Abstraction has 17617 states and 68436 transitions. [2021-06-05 07:09:02,631 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) [2021-06-05 07:09:02,631 INFO L276 IsEmpty]: Start isEmpty. Operand 17617 states and 68436 transitions. [2021-06-05 07:09:02,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:09:02,658 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:02,658 INFO L521 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] [2021-06-05 07:09:02,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2021-06-05 07:09:02,858 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:02,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:02,858 INFO L82 PathProgramCache]: Analyzing trace with hash -933026596, now seen corresponding path program 85 times [2021-06-05 07:09:02,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:02,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542431242] [2021-06-05 07:09:02,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:02,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:02,892 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:02,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:02,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542431242] [2021-06-05 07:09:02,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542431242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:02,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480390836] [2021-06-05 07:09:02,892 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 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 [2021-06-05 07:09:02,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:02,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:09:02,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:03,044 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:03,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480390836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:03,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:03,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:09:03,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569428560] [2021-06-05 07:09:03,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:09:03,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:03,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:09:03,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:09:03,045 INFO L87 Difference]: Start difference. First operand 17617 states and 68436 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) [2021-06-05 07:09:04,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:04,638 INFO L93 Difference]: Finished difference Result 45772 states and 165843 transitions. [2021-06-05 07:09:04,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 07:09:04,638 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 [2021-06-05 07:09:04,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:04,747 INFO L225 Difference]: With dead ends: 45772 [2021-06-05 07:09:04,747 INFO L226 Difference]: Without dead ends: 45772 [2021-06-05 07:09:04,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 933.3ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 07:09:04,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45772 states. [2021-06-05 07:09:05,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45772 to 18979. [2021-06-05 07:09:05,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18979 states, 18978 states have (on average 3.92285804615871) internal successors, (74448), 18978 states have internal predecessors, (74448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:05,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18979 states to 18979 states and 74448 transitions. [2021-06-05 07:09:05,536 INFO L78 Accepts]: Start accepts. Automaton has 18979 states and 74448 transitions. Word has length 28 [2021-06-05 07:09:05,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:05,536 INFO L482 AbstractCegarLoop]: Abstraction has 18979 states and 74448 transitions. [2021-06-05 07:09:05,536 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) [2021-06-05 07:09:05,536 INFO L276 IsEmpty]: Start isEmpty. Operand 18979 states and 74448 transitions. [2021-06-05 07:09:05,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:09:05,566 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:05,566 INFO L521 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] [2021-06-05 07:09:05,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:05,767 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:05,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:05,767 INFO L82 PathProgramCache]: Analyzing trace with hash -366074516, now seen corresponding path program 86 times [2021-06-05 07:09:05,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:05,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526267656] [2021-06-05 07:09:05,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:05,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:05,801 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:05,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:05,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526267656] [2021-06-05 07:09:05,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526267656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:05,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104198056] [2021-06-05 07:09:05,801 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 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 [2021-06-05 07:09:05,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:09:05,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:05,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:09:05,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:05,925 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:05,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104198056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:05,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:05,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:09:05,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041705731] [2021-06-05 07:09:05,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:09:05,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:05,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:09:05,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:09:05,926 INFO L87 Difference]: Start difference. First operand 18979 states and 74448 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) [2021-06-05 07:09:07,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:07,418 INFO L93 Difference]: Finished difference Result 44697 states and 163047 transitions. [2021-06-05 07:09:07,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 07:09:07,418 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 [2021-06-05 07:09:07,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:07,529 INFO L225 Difference]: With dead ends: 44697 [2021-06-05 07:09:07,529 INFO L226 Difference]: Without dead ends: 44697 [2021-06-05 07:09:07,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 890.0ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 07:09:07,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44697 states. [2021-06-05 07:09:08,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44697 to 18947. [2021-06-05 07:09:08,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18947 states, 18946 states have (on average 3.919771983532144) internal successors, (74264), 18946 states have internal predecessors, (74264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:08,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18947 states to 18947 states and 74264 transitions. [2021-06-05 07:09:08,222 INFO L78 Accepts]: Start accepts. Automaton has 18947 states and 74264 transitions. Word has length 28 [2021-06-05 07:09:08,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:08,222 INFO L482 AbstractCegarLoop]: Abstraction has 18947 states and 74264 transitions. [2021-06-05 07:09:08,222 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) [2021-06-05 07:09:08,222 INFO L276 IsEmpty]: Start isEmpty. Operand 18947 states and 74264 transitions. [2021-06-05 07:09:08,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:09:08,250 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:08,250 INFO L521 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] [2021-06-05 07:09:08,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:08,450 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:08,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:08,451 INFO L82 PathProgramCache]: Analyzing trace with hash -648300864, now seen corresponding path program 116 times [2021-06-05 07:09:08,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:08,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649851292] [2021-06-05 07:09:08,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:08,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:08,483 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:08,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:08,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649851292] [2021-06-05 07:09:08,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649851292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:08,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318380003] [2021-06-05 07:09:08,483 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 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 [2021-06-05 07:09:08,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:09:08,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:08,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:09:08,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:08,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:08,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318380003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:08,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:08,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 07:09:08,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762016174] [2021-06-05 07:09:08,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:09:08,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:08,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:09:08,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:09:08,698 INFO L87 Difference]: Start difference. First operand 18947 states and 74264 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) [2021-06-05 07:09:09,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:09,039 INFO L93 Difference]: Finished difference Result 30407 states and 117873 transitions. [2021-06-05 07:09:09,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 07:09:09,039 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 [2021-06-05 07:09:09,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:09,122 INFO L225 Difference]: With dead ends: 30407 [2021-06-05 07:09:09,122 INFO L226 Difference]: Without dead ends: 30360 [2021-06-05 07:09:09,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 108.7ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:09:09,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30360 states. [2021-06-05 07:09:09,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30360 to 24152. [2021-06-05 07:09:09,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24152 states, 24151 states have (on average 3.923150180116765) internal successors, (94748), 24151 states have internal predecessors, (94748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:09,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24152 states to 24152 states and 94748 transitions. [2021-06-05 07:09:09,721 INFO L78 Accepts]: Start accepts. Automaton has 24152 states and 94748 transitions. Word has length 28 [2021-06-05 07:09:09,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:09,721 INFO L482 AbstractCegarLoop]: Abstraction has 24152 states and 94748 transitions. [2021-06-05 07:09:09,721 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) [2021-06-05 07:09:09,721 INFO L276 IsEmpty]: Start isEmpty. Operand 24152 states and 94748 transitions. [2021-06-05 07:09:09,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:09:09,755 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:09,755 INFO L521 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] [2021-06-05 07:09:09,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:09,955 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:09,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:09,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1261765878, now seen corresponding path program 117 times [2021-06-05 07:09:09,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:09,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765995981] [2021-06-05 07:09:09,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:09,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:09,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:09,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:09,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765995981] [2021-06-05 07:09:09,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765995981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:09,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232934262] [2021-06-05 07:09:09,985 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 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 [2021-06-05 07:09:10,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:09:10,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:10,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:09:10,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:10,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:10,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232934262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:10,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:10,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 07:09:10,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575117046] [2021-06-05 07:09:10,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:09:10,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:10,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:09:10,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:09:10,065 INFO L87 Difference]: Start difference. First operand 24152 states and 94748 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) [2021-06-05 07:09:10,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:10,337 INFO L93 Difference]: Finished difference Result 26900 states and 103096 transitions. [2021-06-05 07:09:10,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:09:10,338 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 [2021-06-05 07:09:10,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:10,402 INFO L225 Difference]: With dead ends: 26900 [2021-06-05 07:09:10,402 INFO L226 Difference]: Without dead ends: 26900 [2021-06-05 07:09:10,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:09:10,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26900 states. [2021-06-05 07:09:10,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26900 to 23655. [2021-06-05 07:09:10,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23655 states, 23654 states have (on average 3.913756658493278) internal successors, (92576), 23654 states have internal predecessors, (92576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:10,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23655 states to 23655 states and 92576 transitions. [2021-06-05 07:09:10,869 INFO L78 Accepts]: Start accepts. Automaton has 23655 states and 92576 transitions. Word has length 28 [2021-06-05 07:09:10,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:10,869 INFO L482 AbstractCegarLoop]: Abstraction has 23655 states and 92576 transitions. [2021-06-05 07:09:10,869 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) [2021-06-05 07:09:10,869 INFO L276 IsEmpty]: Start isEmpty. Operand 23655 states and 92576 transitions. [2021-06-05 07:09:10,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:09:10,904 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:10,904 INFO L521 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] [2021-06-05 07:09:11,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:11,105 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:11,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:11,105 INFO L82 PathProgramCache]: Analyzing trace with hash 310084440, now seen corresponding path program 118 times [2021-06-05 07:09:11,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:11,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581669788] [2021-06-05 07:09:11,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:11,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:11,143 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:11,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:11,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581669788] [2021-06-05 07:09:11,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581669788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:11,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217504776] [2021-06-05 07:09:11,144 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 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 [2021-06-05 07:09:11,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:09:11,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:11,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:09:11,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:11,250 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:09:11,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217504776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:11,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:11,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 07:09:11,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230465208] [2021-06-05 07:09:11,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:09:11,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:11,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:09:11,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:09:11,251 INFO L87 Difference]: Start difference. First operand 23655 states and 92576 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) [2021-06-05 07:09:12,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:12,111 INFO L93 Difference]: Finished difference Result 36284 states and 135440 transitions. [2021-06-05 07:09:12,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 07:09:12,112 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 [2021-06-05 07:09:12,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:12,197 INFO L225 Difference]: With dead ends: 36284 [2021-06-05 07:09:12,197 INFO L226 Difference]: Without dead ends: 36284 [2021-06-05 07:09:12,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 473.2ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 07:09:12,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36284 states. [2021-06-05 07:09:12,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36284 to 23725. [2021-06-05 07:09:12,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23725 states, 23724 states have (on average 3.911819254763109) internal successors, (92804), 23724 states have internal predecessors, (92804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:12,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23725 states to 23725 states and 92804 transitions. [2021-06-05 07:09:12,881 INFO L78 Accepts]: Start accepts. Automaton has 23725 states and 92804 transitions. Word has length 28 [2021-06-05 07:09:12,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:12,881 INFO L482 AbstractCegarLoop]: Abstraction has 23725 states and 92804 transitions. [2021-06-05 07:09:12,881 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) [2021-06-05 07:09:12,881 INFO L276 IsEmpty]: Start isEmpty. Operand 23725 states and 92804 transitions. [2021-06-05 07:09:12,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:09:12,917 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:12,917 INFO L521 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] [2021-06-05 07:09:13,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable397,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:13,118 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:13,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:13,118 INFO L82 PathProgramCache]: Analyzing trace with hash -666234404, now seen corresponding path program 119 times [2021-06-05 07:09:13,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:13,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759057849] [2021-06-05 07:09:13,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:13,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:13,166 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:13,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:13,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759057849] [2021-06-05 07:09:13,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759057849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:13,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306063331] [2021-06-05 07:09:13,166 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 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 [2021-06-05 07:09:13,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:09:13,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:13,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:09:13,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:13,300 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:09:13,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306063331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:13,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:13,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 07:09:13,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572160290] [2021-06-05 07:09:13,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:09:13,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:13,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:09:13,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:09:13,301 INFO L87 Difference]: Start difference. First operand 23725 states and 92804 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) [2021-06-05 07:09:14,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:14,731 INFO L93 Difference]: Finished difference Result 46767 states and 172486 transitions. [2021-06-05 07:09:14,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 07:09:14,732 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 [2021-06-05 07:09:14,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:14,842 INFO L225 Difference]: With dead ends: 46767 [2021-06-05 07:09:14,842 INFO L226 Difference]: Without dead ends: 46767 [2021-06-05 07:09:14,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 860.2ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 07:09:14,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46767 states. [2021-06-05 07:09:15,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46767 to 23724. [2021-06-05 07:09:15,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23724 states, 23723 states have (on average 3.913670277789487) internal successors, (92844), 23723 states have internal predecessors, (92844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:15,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23724 states to 23724 states and 92844 transitions. [2021-06-05 07:09:15,685 INFO L78 Accepts]: Start accepts. Automaton has 23724 states and 92844 transitions. Word has length 28 [2021-06-05 07:09:15,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:15,685 INFO L482 AbstractCegarLoop]: Abstraction has 23724 states and 92844 transitions. [2021-06-05 07:09:15,685 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) [2021-06-05 07:09:15,685 INFO L276 IsEmpty]: Start isEmpty. Operand 23724 states and 92844 transitions. [2021-06-05 07:09:15,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:09:15,718 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:15,718 INFO L521 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] [2021-06-05 07:09:15,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-06-05 07:09:15,919 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:15,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:15,919 INFO L82 PathProgramCache]: Analyzing trace with hash -99282324, now seen corresponding path program 120 times [2021-06-05 07:09:15,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:15,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611647857] [2021-06-05 07:09:15,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:15,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:15,955 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:15,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:15,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611647857] [2021-06-05 07:09:15,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611647857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:15,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571954410] [2021-06-05 07:09:15,955 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 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 [2021-06-05 07:09:15,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:09:15,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:15,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:09:15,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:16,071 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:09:16,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571954410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:16,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:16,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 07:09:16,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970384815] [2021-06-05 07:09:16,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:09:16,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:16,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:09:16,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:09:16,072 INFO L87 Difference]: Start difference. First operand 23724 states and 92844 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) [2021-06-05 07:09:17,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:17,597 INFO L93 Difference]: Finished difference Result 46491 states and 172131 transitions. [2021-06-05 07:09:17,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 07:09:17,597 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 [2021-06-05 07:09:17,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:17,718 INFO L225 Difference]: With dead ends: 46491 [2021-06-05 07:09:17,718 INFO L226 Difference]: Without dead ends: 46491 [2021-06-05 07:09:17,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 927.9ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 07:09:17,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46491 states. [2021-06-05 07:09:18,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46491 to 23508. [2021-06-05 07:09:18,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23508 states, 23507 states have (on average 3.9070064236184967) internal successors, (91842), 23507 states have internal predecessors, (91842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:18,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23508 states to 23508 states and 91842 transitions. [2021-06-05 07:09:18,474 INFO L78 Accepts]: Start accepts. Automaton has 23508 states and 91842 transitions. Word has length 28 [2021-06-05 07:09:18,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:18,475 INFO L482 AbstractCegarLoop]: Abstraction has 23508 states and 91842 transitions. [2021-06-05 07:09:18,475 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) [2021-06-05 07:09:18,475 INFO L276 IsEmpty]: Start isEmpty. Operand 23508 states and 91842 transitions. [2021-06-05 07:09:18,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:09:18,511 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:18,511 INFO L521 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] [2021-06-05 07:09:18,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-06-05 07:09:18,712 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:18,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:18,712 INFO L82 PathProgramCache]: Analyzing trace with hash 836856348, now seen corresponding path program 121 times [2021-06-05 07:09:18,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:18,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662274606] [2021-06-05 07:09:18,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:18,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:18,884 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-06-05 07:09:18,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:09:18,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:18,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662274606] [2021-06-05 07:09:18,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662274606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:18,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448837726] [2021-06-05 07:09:18,903 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 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 [2021-06-05 07:09:18,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:18,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:09:18,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:18,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:09:18,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448837726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:18,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:18,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 07:09:18,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236840321] [2021-06-05 07:09:18,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:09:18,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:18,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:09:18,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:09:18,992 INFO L87 Difference]: Start difference. First operand 23508 states and 91842 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) [2021-06-05 07:09:19,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:19,333 INFO L93 Difference]: Finished difference Result 35906 states and 134992 transitions. [2021-06-05 07:09:19,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 07:09:19,334 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 [2021-06-05 07:09:19,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:19,431 INFO L225 Difference]: With dead ends: 35906 [2021-06-05 07:09:19,432 INFO L226 Difference]: Without dead ends: 35889 [2021-06-05 07:09:19,432 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 271.0ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:09:19,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35889 states. [2021-06-05 07:09:20,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35889 to 23779. [2021-06-05 07:09:20,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23779 states, 23778 states have (on average 3.911514845655648) internal successors, (93008), 23778 states have internal predecessors, (93008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:20,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23779 states to 23779 states and 93008 transitions. [2021-06-05 07:09:20,105 INFO L78 Accepts]: Start accepts. Automaton has 23779 states and 93008 transitions. Word has length 28 [2021-06-05 07:09:20,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:20,105 INFO L482 AbstractCegarLoop]: Abstraction has 23779 states and 93008 transitions. [2021-06-05 07:09:20,105 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) [2021-06-05 07:09:20,105 INFO L276 IsEmpty]: Start isEmpty. Operand 23779 states and 93008 transitions. [2021-06-05 07:09:20,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:09:20,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:20,142 INFO L521 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] [2021-06-05 07:09:20,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-05 07:09:20,342 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:20,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:20,343 INFO L82 PathProgramCache]: Analyzing trace with hash -306069692, now seen corresponding path program 122 times [2021-06-05 07:09:20,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:20,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619296598] [2021-06-05 07:09:20,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:20,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:20,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:09:20,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:20,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619296598] [2021-06-05 07:09:20,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619296598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:20,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697093508] [2021-06-05 07:09:20,371 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 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 [2021-06-05 07:09:20,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:09:20,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:20,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:09:20,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:20,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:09:20,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697093508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:20,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:20,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 07:09:20,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667011666] [2021-06-05 07:09:20,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:09:20,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:20,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:09:20,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:09:20,610 INFO L87 Difference]: Start difference. First operand 23779 states and 93008 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) [2021-06-05 07:09:20,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:20,918 INFO L93 Difference]: Finished difference Result 38100 states and 141941 transitions. [2021-06-05 07:09:20,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:09:20,918 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 [2021-06-05 07:09:20,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:21,014 INFO L225 Difference]: With dead ends: 38100 [2021-06-05 07:09:21,014 INFO L226 Difference]: Without dead ends: 38100 [2021-06-05 07:09:21,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 267.7ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:09:21,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38100 states. [2021-06-05 07:09:21,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38100 to 23448. [2021-06-05 07:09:21,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23448 states, 23447 states have (on average 3.8990915682176825) internal successors, (91422), 23447 states have internal predecessors, (91422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:21,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23448 states to 23448 states and 91422 transitions. [2021-06-05 07:09:21,831 INFO L78 Accepts]: Start accepts. Automaton has 23448 states and 91422 transitions. Word has length 28 [2021-06-05 07:09:21,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:21,831 INFO L482 AbstractCegarLoop]: Abstraction has 23448 states and 91422 transitions. [2021-06-05 07:09:21,831 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) [2021-06-05 07:09:21,831 INFO L276 IsEmpty]: Start isEmpty. Operand 23448 states and 91422 transitions. [2021-06-05 07:09:21,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:09:21,876 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:21,876 INFO L521 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] [2021-06-05 07:09:22,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-06-05 07:09:22,099 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:22,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:22,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1652751258, now seen corresponding path program 123 times [2021-06-05 07:09:22,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:22,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435006233] [2021-06-05 07:09:22,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:22,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:22,135 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:22,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:22,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435006233] [2021-06-05 07:09:22,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435006233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:22,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836344428] [2021-06-05 07:09:22,135 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 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 [2021-06-05 07:09:22,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:09:22,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:22,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:09:22,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:22,236 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:09:22,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836344428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:22,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:22,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 07:09:22,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400785297] [2021-06-05 07:09:22,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:09:22,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:22,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:09:22,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:09:22,237 INFO L87 Difference]: Start difference. First operand 23448 states and 91422 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) [2021-06-05 07:09:23,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:23,197 INFO L93 Difference]: Finished difference Result 33419 states and 125361 transitions. [2021-06-05 07:09:23,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 07:09:23,198 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 [2021-06-05 07:09:23,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:23,295 INFO L225 Difference]: With dead ends: 33419 [2021-06-05 07:09:23,296 INFO L226 Difference]: Without dead ends: 33419 [2021-06-05 07:09:23,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 402.4ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:09:23,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33419 states. [2021-06-05 07:09:23,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33419 to 23496. [2021-06-05 07:09:23,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23496 states, 23495 states have (on average 3.8977654820174505) internal successors, (91578), 23495 states have internal predecessors, (91578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:24,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23496 states to 23496 states and 91578 transitions. [2021-06-05 07:09:24,048 INFO L78 Accepts]: Start accepts. Automaton has 23496 states and 91578 transitions. Word has length 28 [2021-06-05 07:09:24,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:24,048 INFO L482 AbstractCegarLoop]: Abstraction has 23496 states and 91578 transitions. [2021-06-05 07:09:24,048 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) [2021-06-05 07:09:24,048 INFO L276 IsEmpty]: Start isEmpty. Operand 23496 states and 91578 transitions. [2021-06-05 07:09:24,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:09:24,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:24,083 INFO L521 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] [2021-06-05 07:09:24,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2021-06-05 07:09:24,283 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:24,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:24,284 INFO L82 PathProgramCache]: Analyzing trace with hash -867837164, now seen corresponding path program 124 times [2021-06-05 07:09:24,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:24,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233809041] [2021-06-05 07:09:24,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:24,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:24,319 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:24,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:24,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233809041] [2021-06-05 07:09:24,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233809041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:24,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938713387] [2021-06-05 07:09:24,320 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 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 [2021-06-05 07:09:24,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:09:24,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:24,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:09:24,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:24,420 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:09:24,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938713387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:24,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:24,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 07:09:24,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369408639] [2021-06-05 07:09:24,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:09:24,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:24,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:09:24,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:09:24,421 INFO L87 Difference]: Start difference. First operand 23496 states and 91578 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) [2021-06-05 07:09:25,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:25,648 INFO L93 Difference]: Finished difference Result 35119 states and 130293 transitions. [2021-06-05 07:09:25,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 07:09:25,649 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 [2021-06-05 07:09:25,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:25,733 INFO L225 Difference]: With dead ends: 35119 [2021-06-05 07:09:25,734 INFO L226 Difference]: Without dead ends: 35119 [2021-06-05 07:09:25,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1621 ImplicationChecksByTransitivity, 555.5ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 07:09:25,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35119 states. [2021-06-05 07:09:26,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35119 to 24060. [2021-06-05 07:09:26,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24060 states, 24059 states have (on average 3.878964212976433) internal successors, (93324), 24059 states have internal predecessors, (93324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:26,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24060 states to 24060 states and 93324 transitions. [2021-06-05 07:09:26,501 INFO L78 Accepts]: Start accepts. Automaton has 24060 states and 93324 transitions. Word has length 28 [2021-06-05 07:09:26,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:26,502 INFO L482 AbstractCegarLoop]: Abstraction has 24060 states and 93324 transitions. [2021-06-05 07:09:26,502 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) [2021-06-05 07:09:26,502 INFO L276 IsEmpty]: Start isEmpty. Operand 24060 states and 93324 transitions. [2021-06-05 07:09:26,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:09:26,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:26,543 INFO L521 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] [2021-06-05 07:09:26,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:26,744 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:26,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:26,744 INFO L82 PathProgramCache]: Analyzing trace with hash -912658306, now seen corresponding path program 125 times [2021-06-05 07:09:26,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:26,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016416328] [2021-06-05 07:09:26,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:26,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:26,792 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:26,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:26,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016416328] [2021-06-05 07:09:26,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016416328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:26,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914627476] [2021-06-05 07:09:26,793 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 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 [2021-06-05 07:09:26,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:09:26,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:26,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:09:26,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:26,893 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:09:26,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914627476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:26,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:26,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 07:09:26,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905475507] [2021-06-05 07:09:26,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:09:26,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:26,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:09:26,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:09:26,894 INFO L87 Difference]: Start difference. First operand 24060 states and 93324 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) [2021-06-05 07:09:27,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:27,877 INFO L93 Difference]: Finished difference Result 34157 states and 127778 transitions. [2021-06-05 07:09:27,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 07:09:27,878 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 [2021-06-05 07:09:27,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:27,959 INFO L225 Difference]: With dead ends: 34157 [2021-06-05 07:09:27,959 INFO L226 Difference]: Without dead ends: 34153 [2021-06-05 07:09:27,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 480.4ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 07:09:27,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34153 states. [2021-06-05 07:09:28,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34153 to 23952. [2021-06-05 07:09:28,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23952 states, 23951 states have (on average 3.8814245751743144) internal successors, (92964), 23951 states have internal predecessors, (92964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:28,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23952 states to 23952 states and 92964 transitions. [2021-06-05 07:09:28,794 INFO L78 Accepts]: Start accepts. Automaton has 23952 states and 92964 transitions. Word has length 28 [2021-06-05 07:09:28,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:28,794 INFO L482 AbstractCegarLoop]: Abstraction has 23952 states and 92964 transitions. [2021-06-05 07:09:28,794 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) [2021-06-05 07:09:28,794 INFO L276 IsEmpty]: Start isEmpty. Operand 23952 states and 92964 transitions. [2021-06-05 07:09:28,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:09:28,845 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:28,845 INFO L521 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] [2021-06-05 07:09:29,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-06-05 07:09:29,053 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:29,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:29,053 INFO L82 PathProgramCache]: Analyzing trace with hash -47274368, now seen corresponding path program 126 times [2021-06-05 07:09:29,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:29,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388326953] [2021-06-05 07:09:29,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:29,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:29,080 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:09:29,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:29,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388326953] [2021-06-05 07:09:29,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388326953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:29,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858929885] [2021-06-05 07:09:29,080 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 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 [2021-06-05 07:09:29,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:09:29,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:29,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:09:29,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:29,165 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 07:09:29,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858929885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:29,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:29,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 07:09:29,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57165162] [2021-06-05 07:09:29,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:09:29,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:29,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:09:29,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:09:29,166 INFO L87 Difference]: Start difference. First operand 23952 states and 92964 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) [2021-06-05 07:09:29,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:29,453 INFO L93 Difference]: Finished difference Result 30321 states and 113570 transitions. [2021-06-05 07:09:29,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 07:09:29,454 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 [2021-06-05 07:09:29,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:29,525 INFO L225 Difference]: With dead ends: 30321 [2021-06-05 07:09:29,525 INFO L226 Difference]: Without dead ends: 30321 [2021-06-05 07:09:29,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 109.2ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:09:29,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30321 states. [2021-06-05 07:09:30,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30321 to 24262. [2021-06-05 07:09:30,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24262 states, 24261 states have (on average 3.8735831169366475) internal successors, (93977), 24261 states have internal predecessors, (93977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:30,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24262 states to 24262 states and 93977 transitions. [2021-06-05 07:09:30,398 INFO L78 Accepts]: Start accepts. Automaton has 24262 states and 93977 transitions. Word has length 28 [2021-06-05 07:09:30,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:30,398 INFO L482 AbstractCegarLoop]: Abstraction has 24262 states and 93977 transitions. [2021-06-05 07:09:30,398 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) [2021-06-05 07:09:30,398 INFO L276 IsEmpty]: Start isEmpty. Operand 24262 states and 93977 transitions. [2021-06-05 07:09:30,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:09:30,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:30,456 INFO L521 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] [2021-06-05 07:09:30,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:30,657 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:30,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:30,657 INFO L82 PathProgramCache]: Analyzing trace with hash 882925376, now seen corresponding path program 127 times [2021-06-05 07:09:30,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:30,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842456766] [2021-06-05 07:09:30,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:30,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:30,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:30,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842456766] [2021-06-05 07:09:30,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842456766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:30,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297976554] [2021-06-05 07:09:30,692 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 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 [2021-06-05 07:09:30,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:30,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:09:30,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:30,779 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:09:30,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297976554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:30,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:30,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 07:09:30,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510961747] [2021-06-05 07:09:30,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:09:30,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:30,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:09:30,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:09:30,779 INFO L87 Difference]: Start difference. First operand 24262 states and 93977 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) [2021-06-05 07:09:31,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:31,602 INFO L93 Difference]: Finished difference Result 35215 states and 130243 transitions. [2021-06-05 07:09:31,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 07:09:31,603 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 [2021-06-05 07:09:31,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:31,821 INFO L225 Difference]: With dead ends: 35215 [2021-06-05 07:09:31,822 INFO L226 Difference]: Without dead ends: 35215 [2021-06-05 07:09:31,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 425.2ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 07:09:31,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35215 states. [2021-06-05 07:09:32,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35215 to 26047. [2021-06-05 07:09:32,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26047 states, 26046 states have (on average 3.8823235813560624) internal successors, (101119), 26046 states have internal predecessors, (101119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:32,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26047 states to 26047 states and 101119 transitions. [2021-06-05 07:09:32,473 INFO L78 Accepts]: Start accepts. Automaton has 26047 states and 101119 transitions. Word has length 28 [2021-06-05 07:09:32,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:32,473 INFO L482 AbstractCegarLoop]: Abstraction has 26047 states and 101119 transitions. [2021-06-05 07:09:32,473 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) [2021-06-05 07:09:32,474 INFO L276 IsEmpty]: Start isEmpty. Operand 26047 states and 101119 transitions. [2021-06-05 07:09:32,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:09:32,511 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:32,511 INFO L521 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] [2021-06-05 07:09:32,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:32,712 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:32,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:32,712 INFO L82 PathProgramCache]: Analyzing trace with hash -956846952, now seen corresponding path program 128 times [2021-06-05 07:09:32,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:32,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539809317] [2021-06-05 07:09:32,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:32,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:32,747 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:32,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:32,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539809317] [2021-06-05 07:09:32,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539809317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:32,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144101162] [2021-06-05 07:09:32,747 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 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 [2021-06-05 07:09:32,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:09:32,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:32,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:09:32,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:32,829 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:09:32,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144101162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:32,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:32,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 07:09:32,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805134279] [2021-06-05 07:09:32,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:09:32,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:32,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:09:32,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:09:32,830 INFO L87 Difference]: Start difference. First operand 26047 states and 101119 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) [2021-06-05 07:09:33,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:33,717 INFO L93 Difference]: Finished difference Result 33427 states and 125631 transitions. [2021-06-05 07:09:33,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 07:09:33,717 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 [2021-06-05 07:09:33,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:33,804 INFO L225 Difference]: With dead ends: 33427 [2021-06-05 07:09:33,804 INFO L226 Difference]: Without dead ends: 33415 [2021-06-05 07:09:33,804 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 346.7ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:09:33,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33415 states. [2021-06-05 07:09:34,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33415 to 26213. [2021-06-05 07:09:34,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26213 states, 26212 states have (on average 3.8773081031588585) internal successors, (101632), 26212 states have internal predecessors, (101632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:34,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26213 states to 26213 states and 101632 transitions. [2021-06-05 07:09:34,649 INFO L78 Accepts]: Start accepts. Automaton has 26213 states and 101632 transitions. Word has length 28 [2021-06-05 07:09:34,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:34,649 INFO L482 AbstractCegarLoop]: Abstraction has 26213 states and 101632 transitions. [2021-06-05 07:09:34,649 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) [2021-06-05 07:09:34,649 INFO L276 IsEmpty]: Start isEmpty. Operand 26213 states and 101632 transitions. [2021-06-05 07:09:34,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:09:34,687 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:34,687 INFO L521 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] [2021-06-05 07:09:34,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:34,888 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:34,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:34,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1587630268, now seen corresponding path program 129 times [2021-06-05 07:09:34,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:34,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406921964] [2021-06-05 07:09:34,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:34,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:34,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:09:34,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:34,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406921964] [2021-06-05 07:09:34,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406921964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:34,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645408849] [2021-06-05 07:09:34,916 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 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 [2021-06-05 07:09:34,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:09:34,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:34,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:09:34,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:34,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:09:34,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645408849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:34,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:34,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 07:09:34,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383913502] [2021-06-05 07:09:34,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:09:34,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:34,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:09:34,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:09:34,998 INFO L87 Difference]: Start difference. First operand 26213 states and 101632 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) [2021-06-05 07:09:35,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:35,255 INFO L93 Difference]: Finished difference Result 30773 states and 117208 transitions. [2021-06-05 07:09:35,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 07:09:35,256 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 [2021-06-05 07:09:35,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:35,333 INFO L225 Difference]: With dead ends: 30773 [2021-06-05 07:09:35,333 INFO L226 Difference]: Without dead ends: 30773 [2021-06-05 07:09:35,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 99.0ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:09:35,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30773 states. [2021-06-05 07:09:35,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30773 to 27420. [2021-06-05 07:09:35,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27420 states, 27419 states have (on average 3.8735183631788175) internal successors, (106208), 27419 states have internal predecessors, (106208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:36,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27420 states to 27420 states and 106208 transitions. [2021-06-05 07:09:36,073 INFO L78 Accepts]: Start accepts. Automaton has 27420 states and 106208 transitions. Word has length 28 [2021-06-05 07:09:36,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:36,073 INFO L482 AbstractCegarLoop]: Abstraction has 27420 states and 106208 transitions. [2021-06-05 07:09:36,073 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) [2021-06-05 07:09:36,074 INFO L276 IsEmpty]: Start isEmpty. Operand 27420 states and 106208 transitions. [2021-06-05 07:09:36,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:09:36,119 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:36,119 INFO L521 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] [2021-06-05 07:09:36,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2021-06-05 07:09:36,319 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:36,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:36,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1143968700, now seen corresponding path program 130 times [2021-06-05 07:09:36,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:36,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909279862] [2021-06-05 07:09:36,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:36,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:36,356 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:36,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:36,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909279862] [2021-06-05 07:09:36,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909279862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:36,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924516284] [2021-06-05 07:09:36,357 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 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 [2021-06-05 07:09:36,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:09:36,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:36,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:09:36,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:36,447 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:36,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924516284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:36,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:36,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 07:09:36,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585617549] [2021-06-05 07:09:36,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:09:36,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:36,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:09:36,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:09:36,447 INFO L87 Difference]: Start difference. First operand 27420 states and 106208 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) [2021-06-05 07:09:37,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:37,441 INFO L93 Difference]: Finished difference Result 35583 states and 132544 transitions. [2021-06-05 07:09:37,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 07:09:37,441 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 [2021-06-05 07:09:37,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:37,533 INFO L225 Difference]: With dead ends: 35583 [2021-06-05 07:09:37,534 INFO L226 Difference]: Without dead ends: 35583 [2021-06-05 07:09:37,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 414.7ms TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:09:37,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35583 states. [2021-06-05 07:09:38,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35583 to 28674. [2021-06-05 07:09:38,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28674 states, 28673 states have (on average 3.842116276636557) internal successors, (110165), 28673 states have internal predecessors, (110165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:38,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28674 states to 28674 states and 110165 transitions. [2021-06-05 07:09:38,444 INFO L78 Accepts]: Start accepts. Automaton has 28674 states and 110165 transitions. Word has length 28 [2021-06-05 07:09:38,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:38,444 INFO L482 AbstractCegarLoop]: Abstraction has 28674 states and 110165 transitions. [2021-06-05 07:09:38,444 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) [2021-06-05 07:09:38,444 INFO L276 IsEmpty]: Start isEmpty. Operand 28674 states and 110165 transitions. [2021-06-05 07:09:38,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:09:38,499 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:38,499 INFO L521 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] [2021-06-05 07:09:38,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:38,699 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:38,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:38,700 INFO L82 PathProgramCache]: Analyzing trace with hash -403875748, now seen corresponding path program 131 times [2021-06-05 07:09:38,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:38,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355425873] [2021-06-05 07:09:38,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:38,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:38,734 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:38,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:38,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355425873] [2021-06-05 07:09:38,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355425873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:38,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880920735] [2021-06-05 07:09:38,735 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 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 [2021-06-05 07:09:38,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 07:09:38,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:38,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:09:38,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:38,826 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:38,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880920735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:38,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:38,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 07:09:38,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98332525] [2021-06-05 07:09:38,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:09:38,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:38,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:09:38,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:09:38,827 INFO L87 Difference]: Start difference. First operand 28674 states and 110165 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) [2021-06-05 07:09:39,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:39,634 INFO L93 Difference]: Finished difference Result 34707 states and 130204 transitions. [2021-06-05 07:09:39,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:09:39,634 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 [2021-06-05 07:09:39,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:39,717 INFO L225 Difference]: With dead ends: 34707 [2021-06-05 07:09:39,717 INFO L226 Difference]: Without dead ends: 34699 [2021-06-05 07:09:39,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 298.2ms TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:09:39,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34699 states. [2021-06-05 07:09:40,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34699 to 28480. [2021-06-05 07:09:40,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28480 states, 28479 states have (on average 3.847958144597774) internal successors, (109586), 28479 states have internal predecessors, (109586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:40,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28480 states to 28480 states and 109586 transitions. [2021-06-05 07:09:40,474 INFO L78 Accepts]: Start accepts. Automaton has 28480 states and 109586 transitions. Word has length 28 [2021-06-05 07:09:40,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:40,475 INFO L482 AbstractCegarLoop]: Abstraction has 28480 states and 109586 transitions. [2021-06-05 07:09:40,475 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) [2021-06-05 07:09:40,475 INFO L276 IsEmpty]: Start isEmpty. Operand 28480 states and 109586 transitions. [2021-06-05 07:09:40,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:09:40,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:40,521 INFO L521 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] [2021-06-05 07:09:40,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-06-05 07:09:40,721 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:40,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:40,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1046121180, now seen corresponding path program 132 times [2021-06-05 07:09:40,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:40,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172545284] [2021-06-05 07:09:40,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:40,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:40,758 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:40,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:40,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172545284] [2021-06-05 07:09:40,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172545284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:40,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192714015] [2021-06-05 07:09:40,758 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 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 [2021-06-05 07:09:40,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:09:40,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:40,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:09:40,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:40,842 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:40,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192714015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:40,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:40,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 07:09:40,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826977109] [2021-06-05 07:09:40,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:09:40,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:40,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:09:40,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:09:40,843 INFO L87 Difference]: Start difference. First operand 28480 states and 109586 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) [2021-06-05 07:09:41,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:41,756 INFO L93 Difference]: Finished difference Result 36567 states and 135873 transitions. [2021-06-05 07:09:41,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 07:09:41,756 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 [2021-06-05 07:09:41,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:41,848 INFO L225 Difference]: With dead ends: 36567 [2021-06-05 07:09:41,848 INFO L226 Difference]: Without dead ends: 36567 [2021-06-05 07:09:41,849 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 377.0ms TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 07:09:41,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36567 states. [2021-06-05 07:09:42,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36567 to 29508. [2021-06-05 07:09:42,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29508 states, 29507 states have (on average 3.8260073880774055) internal successors, (112894), 29507 states have internal predecessors, (112894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:42,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29508 states to 29508 states and 112894 transitions. [2021-06-05 07:09:42,691 INFO L78 Accepts]: Start accepts. Automaton has 29508 states and 112894 transitions. Word has length 28 [2021-06-05 07:09:42,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:42,691 INFO L482 AbstractCegarLoop]: Abstraction has 29508 states and 112894 transitions. [2021-06-05 07:09:42,691 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) [2021-06-05 07:09:42,691 INFO L276 IsEmpty]: Start isEmpty. Operand 29508 states and 112894 transitions. [2021-06-05 07:09:42,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:09:42,749 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:42,749 INFO L521 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] [2021-06-05 07:09:42,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-05 07:09:42,950 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:42,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:42,950 INFO L82 PathProgramCache]: Analyzing trace with hash -36901476, now seen corresponding path program 133 times [2021-06-05 07:09:42,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:42,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601009715] [2021-06-05 07:09:42,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:42,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:42,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:42,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:42,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601009715] [2021-06-05 07:09:42,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601009715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:42,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295252861] [2021-06-05 07:09:42,985 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 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 [2021-06-05 07:09:43,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:43,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:09:43,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:43,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:43,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295252861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:43,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:43,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 07:09:43,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117711301] [2021-06-05 07:09:43,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:09:43,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:43,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:09:43,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:09:43,062 INFO L87 Difference]: Start difference. First operand 29508 states and 112894 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) [2021-06-05 07:09:43,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:43,476 INFO L93 Difference]: Finished difference Result 35843 states and 136177 transitions. [2021-06-05 07:09:43,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:09:43,476 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 [2021-06-05 07:09:43,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:43,573 INFO L225 Difference]: With dead ends: 35843 [2021-06-05 07:09:43,573 INFO L226 Difference]: Without dead ends: 35830 [2021-06-05 07:09:43,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 138.0ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:09:43,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35830 states. [2021-06-05 07:09:44,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35830 to 34303. [2021-06-05 07:09:44,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34303 states, 34302 states have (on average 3.8411171360270537) internal successors, (131758), 34302 states have internal predecessors, (131758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:44,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34303 states to 34303 states and 131758 transitions. [2021-06-05 07:09:44,526 INFO L78 Accepts]: Start accepts. Automaton has 34303 states and 131758 transitions. Word has length 28 [2021-06-05 07:09:44,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:44,526 INFO L482 AbstractCegarLoop]: Abstraction has 34303 states and 131758 transitions. [2021-06-05 07:09:44,526 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) [2021-06-05 07:09:44,526 INFO L276 IsEmpty]: Start isEmpty. Operand 34303 states and 131758 transitions. [2021-06-05 07:09:44,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:09:44,585 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:44,585 INFO L521 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] [2021-06-05 07:09:44,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-06-05 07:09:44,785 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:44,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:44,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1434176642, now seen corresponding path program 134 times [2021-06-05 07:09:44,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:44,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014887382] [2021-06-05 07:09:44,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:44,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:44,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:44,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:44,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014887382] [2021-06-05 07:09:44,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014887382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:44,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861293301] [2021-06-05 07:09:44,818 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 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 [2021-06-05 07:09:44,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:09:44,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:44,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:09:44,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:44,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:44,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861293301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:44,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:44,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 07:09:44,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707468647] [2021-06-05 07:09:44,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:09:44,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:44,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:09:44,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:09:44,892 INFO L87 Difference]: Start difference. First operand 34303 states and 131758 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) [2021-06-05 07:09:45,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:45,530 INFO L93 Difference]: Finished difference Result 37460 states and 141660 transitions. [2021-06-05 07:09:45,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:09:45,530 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 [2021-06-05 07:09:45,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:45,618 INFO L225 Difference]: With dead ends: 37460 [2021-06-05 07:09:45,618 INFO L226 Difference]: Without dead ends: 37460 [2021-06-05 07:09:45,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 130.9ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:09:45,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37460 states. [2021-06-05 07:09:46,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37460 to 33980. [2021-06-05 07:09:46,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33980 states, 33979 states have (on average 3.8373995703228463) internal successors, (130391), 33979 states have internal predecessors, (130391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:46,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33980 states to 33980 states and 130391 transitions. [2021-06-05 07:09:46,564 INFO L78 Accepts]: Start accepts. Automaton has 33980 states and 130391 transitions. Word has length 28 [2021-06-05 07:09:46,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:46,564 INFO L482 AbstractCegarLoop]: Abstraction has 33980 states and 130391 transitions. [2021-06-05 07:09:46,564 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) [2021-06-05 07:09:46,564 INFO L276 IsEmpty]: Start isEmpty. Operand 33980 states and 130391 transitions. [2021-06-05 07:09:46,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:09:46,619 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:46,619 INFO L521 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] [2021-06-05 07:09:46,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable413,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:46,820 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:46,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:46,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1001300038, now seen corresponding path program 135 times [2021-06-05 07:09:46,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:46,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919772642] [2021-06-05 07:09:46,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:46,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:46,876 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:46,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:46,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919772642] [2021-06-05 07:09:46,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919772642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:46,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848818139] [2021-06-05 07:09:46,877 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 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 [2021-06-05 07:09:46,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:09:46,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:46,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:09:46,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:46,983 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:46,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848818139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:46,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:46,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 07:09:46,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265189159] [2021-06-05 07:09:46,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:09:46,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:46,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:09:46,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:09:46,984 INFO L87 Difference]: Start difference. First operand 33980 states and 130391 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) [2021-06-05 07:09:47,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:47,614 INFO L93 Difference]: Finished difference Result 40756 states and 152783 transitions. [2021-06-05 07:09:47,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 07:09:47,615 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 [2021-06-05 07:09:47,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:47,717 INFO L225 Difference]: With dead ends: 40756 [2021-06-05 07:09:47,717 INFO L226 Difference]: Without dead ends: 40748 [2021-06-05 07:09:47,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 291.6ms TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:09:47,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40748 states. [2021-06-05 07:09:48,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40748 to 33946. [2021-06-05 07:09:48,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33946 states, 33945 states have (on average 3.8377964354102225) internal successors, (130274), 33945 states have internal predecessors, (130274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:48,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33946 states to 33946 states and 130274 transitions. [2021-06-05 07:09:48,793 INFO L78 Accepts]: Start accepts. Automaton has 33946 states and 130274 transitions. Word has length 28 [2021-06-05 07:09:48,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:48,793 INFO L482 AbstractCegarLoop]: Abstraction has 33946 states and 130274 transitions. [2021-06-05 07:09:48,793 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) [2021-06-05 07:09:48,793 INFO L276 IsEmpty]: Start isEmpty. Operand 33946 states and 130274 transitions. [2021-06-05 07:09:48,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:09:48,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:48,854 INFO L521 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] [2021-06-05 07:09:49,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-06-05 07:09:49,054 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:49,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:49,055 INFO L82 PathProgramCache]: Analyzing trace with hash 105479222, now seen corresponding path program 136 times [2021-06-05 07:09:49,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:49,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961458455] [2021-06-05 07:09:49,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:49,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:49,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:09:49,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:49,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961458455] [2021-06-05 07:09:49,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961458455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:49,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726371598] [2021-06-05 07:09:49,092 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 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 [2021-06-05 07:09:49,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:09:49,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:49,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:09:49,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:49,173 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:09:49,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726371598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:49,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:49,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 07:09:49,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534214542] [2021-06-05 07:09:49,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:09:49,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:49,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:09:49,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:09:49,174 INFO L87 Difference]: Start difference. First operand 33946 states and 130274 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) [2021-06-05 07:09:49,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:49,805 INFO L93 Difference]: Finished difference Result 36862 states and 139999 transitions. [2021-06-05 07:09:49,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:09:49,806 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 [2021-06-05 07:09:49,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:49,896 INFO L225 Difference]: With dead ends: 36862 [2021-06-05 07:09:49,896 INFO L226 Difference]: Without dead ends: 36862 [2021-06-05 07:09:49,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 196.0ms TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:09:49,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36862 states. [2021-06-05 07:09:50,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36862 to 34478. [2021-06-05 07:09:50,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34478 states, 34477 states have (on average 3.8361226324796243) internal successors, (132258), 34477 states have internal predecessors, (132258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:50,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34478 states to 34478 states and 132258 transitions. [2021-06-05 07:09:50,846 INFO L78 Accepts]: Start accepts. Automaton has 34478 states and 132258 transitions. Word has length 28 [2021-06-05 07:09:50,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:50,846 INFO L482 AbstractCegarLoop]: Abstraction has 34478 states and 132258 transitions. [2021-06-05 07:09:50,846 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) [2021-06-05 07:09:50,846 INFO L276 IsEmpty]: Start isEmpty. Operand 34478 states and 132258 transitions. [2021-06-05 07:09:50,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:09:50,901 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:50,902 INFO L521 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] [2021-06-05 07:09:51,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:51,102 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:51,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:51,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1598636696, now seen corresponding path program 137 times [2021-06-05 07:09:51,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:51,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425567584] [2021-06-05 07:09:51,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:51,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:51,134 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:09:51,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:51,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425567584] [2021-06-05 07:09:51,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425567584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:51,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094265824] [2021-06-05 07:09:51,134 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 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 [2021-06-05 07:09:51,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:09:51,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:51,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:09:51,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:51,213 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:09:51,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094265824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:51,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:51,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 07:09:51,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777513380] [2021-06-05 07:09:51,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:09:51,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:51,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:09:51,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:09:51,214 INFO L87 Difference]: Start difference. First operand 34478 states and 132258 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) [2021-06-05 07:09:51,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:51,813 INFO L93 Difference]: Finished difference Result 41641 states and 156125 transitions. [2021-06-05 07:09:51,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:09:51,813 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 [2021-06-05 07:09:51,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:51,915 INFO L225 Difference]: With dead ends: 41641 [2021-06-05 07:09:51,915 INFO L226 Difference]: Without dead ends: 41617 [2021-06-05 07:09:51,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 263.5ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:09:51,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41617 states. [2021-06-05 07:09:52,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41617 to 34650. [2021-06-05 07:09:52,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34650 states, 34649 states have (on average 3.832491558197928) internal successors, (132792), 34649 states have internal predecessors, (132792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:52,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34650 states to 34650 states and 132792 transitions. [2021-06-05 07:09:52,894 INFO L78 Accepts]: Start accepts. Automaton has 34650 states and 132792 transitions. Word has length 28 [2021-06-05 07:09:52,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:52,894 INFO L482 AbstractCegarLoop]: Abstraction has 34650 states and 132792 transitions. [2021-06-05 07:09:52,894 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) [2021-06-05 07:09:52,894 INFO L276 IsEmpty]: Start isEmpty. Operand 34650 states and 132792 transitions. [2021-06-05 07:09:52,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:09:52,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:52,950 INFO L521 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] [2021-06-05 07:09:53,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2021-06-05 07:09:53,150 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:53,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:53,151 INFO L82 PathProgramCache]: Analyzing trace with hash -252372998, now seen corresponding path program 138 times [2021-06-05 07:09:53,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:53,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419030371] [2021-06-05 07:09:53,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:53,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:53,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:53,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:53,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419030371] [2021-06-05 07:09:53,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419030371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:53,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295688885] [2021-06-05 07:09:53,188 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 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 [2021-06-05 07:09:53,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:09:53,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:53,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:09:53,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:53,264 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:53,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295688885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:53,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:53,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-05 07:09:53,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146812948] [2021-06-05 07:09:53,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:09:53,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:53,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:09:53,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:09:53,264 INFO L87 Difference]: Start difference. First operand 34650 states and 132792 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) [2021-06-05 07:09:53,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:53,965 INFO L93 Difference]: Finished difference Result 37282 states and 141492 transitions. [2021-06-05 07:09:53,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:09:53,965 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 [2021-06-05 07:09:53,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:54,062 INFO L225 Difference]: With dead ends: 37282 [2021-06-05 07:09:54,062 INFO L226 Difference]: Without dead ends: 37282 [2021-06-05 07:09:54,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 392.7ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:09:54,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37282 states. [2021-06-05 07:09:54,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37282 to 34576. [2021-06-05 07:09:55,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34576 states, 34575 states have (on average 3.833289949385394) internal successors, (132536), 34575 states have internal predecessors, (132536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:55,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34576 states to 34576 states and 132536 transitions. [2021-06-05 07:09:55,150 INFO L78 Accepts]: Start accepts. Automaton has 34576 states and 132536 transitions. Word has length 28 [2021-06-05 07:09:55,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:55,150 INFO L482 AbstractCegarLoop]: Abstraction has 34576 states and 132536 transitions. [2021-06-05 07:09:55,150 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) [2021-06-05 07:09:55,150 INFO L276 IsEmpty]: Start isEmpty. Operand 34576 states and 132536 transitions. [2021-06-05 07:09:55,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:09:55,205 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:55,205 INFO L521 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] [2021-06-05 07:09:55,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:55,405 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:55,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:55,406 INFO L82 PathProgramCache]: Analyzing trace with hash 606143132, now seen corresponding path program 139 times [2021-06-05 07:09:55,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:55,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20332155] [2021-06-05 07:09:55,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:55,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:55,442 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:55,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:55,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20332155] [2021-06-05 07:09:55,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20332155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:55,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024579589] [2021-06-05 07:09:55,443 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 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 [2021-06-05 07:09:55,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:55,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:09:55,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:55,522 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:55,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024579589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:55,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:55,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 07:09:55,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172545022] [2021-06-05 07:09:55,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:09:55,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:55,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:09:55,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:09:55,523 INFO L87 Difference]: Start difference. First operand 34576 states and 132536 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) [2021-06-05 07:09:56,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:56,185 INFO L93 Difference]: Finished difference Result 41564 states and 155866 transitions. [2021-06-05 07:09:56,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 07:09:56,185 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 [2021-06-05 07:09:56,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:56,285 INFO L225 Difference]: With dead ends: 41564 [2021-06-05 07:09:56,285 INFO L226 Difference]: Without dead ends: 41524 [2021-06-05 07:09:56,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 307.7ms TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:09:56,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41524 states. [2021-06-05 07:09:57,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41524 to 34750. [2021-06-05 07:09:57,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34750 states, 34749 states have (on average 3.829549051771274) internal successors, (133073), 34749 states have internal predecessors, (133073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:57,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34750 states to 34750 states and 133073 transitions. [2021-06-05 07:09:57,300 INFO L78 Accepts]: Start accepts. Automaton has 34750 states and 133073 transitions. Word has length 28 [2021-06-05 07:09:57,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:57,300 INFO L482 AbstractCegarLoop]: Abstraction has 34750 states and 133073 transitions. [2021-06-05 07:09:57,301 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) [2021-06-05 07:09:57,301 INFO L276 IsEmpty]: Start isEmpty. Operand 34750 states and 133073 transitions. [2021-06-05 07:09:57,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:09:57,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:57,354 INFO L521 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] [2021-06-05 07:09:57,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2021-06-05 07:09:57,554 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:57,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:57,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1649950116, now seen corresponding path program 140 times [2021-06-05 07:09:57,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:57,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943713906] [2021-06-05 07:09:57,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:57,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:57,587 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:57,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:57,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943713906] [2021-06-05 07:09:57,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943713906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:57,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927511125] [2021-06-05 07:09:57,588 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 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 [2021-06-05 07:09:57,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:09:57,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:57,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:09:57,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:57,711 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:57,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927511125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:57,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:57,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:09:57,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477336647] [2021-06-05 07:09:57,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:09:57,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:57,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:09:57,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:09:57,712 INFO L87 Difference]: Start difference. First operand 34750 states and 133073 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) [2021-06-05 07:09:59,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:59,202 INFO L93 Difference]: Finished difference Result 77130 states and 285331 transitions. [2021-06-05 07:09:59,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 07:09:59,203 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 [2021-06-05 07:09:59,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:59,404 INFO L225 Difference]: With dead ends: 77130 [2021-06-05 07:09:59,404 INFO L226 Difference]: Without dead ends: 77130 [2021-06-05 07:09:59,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 645.6ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 07:09:59,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77130 states. [2021-06-05 07:10:01,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77130 to 43844. [2021-06-05 07:10:01,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43844 states, 43843 states have (on average 3.9042264443582786) internal successors, (171173), 43843 states have internal predecessors, (171173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:01,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43844 states to 43844 states and 171173 transitions. [2021-06-05 07:10:01,263 INFO L78 Accepts]: Start accepts. Automaton has 43844 states and 171173 transitions. Word has length 28 [2021-06-05 07:10:01,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:01,263 INFO L482 AbstractCegarLoop]: Abstraction has 43844 states and 171173 transitions. [2021-06-05 07:10:01,263 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) [2021-06-05 07:10:01,263 INFO L276 IsEmpty]: Start isEmpty. Operand 43844 states and 171173 transitions. [2021-06-05 07:10:01,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:10:01,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:01,332 INFO L521 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] [2021-06-05 07:10:01,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:01,532 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:01,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:01,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1082998036, now seen corresponding path program 141 times [2021-06-05 07:10:01,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:01,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207308798] [2021-06-05 07:10:01,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:01,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:01,582 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:01,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:01,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207308798] [2021-06-05 07:10:01,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207308798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:01,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270917643] [2021-06-05 07:10:01,582 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 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 [2021-06-05 07:10:01,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:10:01,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:01,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:10:01,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:01,706 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:01,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270917643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:01,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:01,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:10:01,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216716734] [2021-06-05 07:10:01,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:10:01,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:01,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:10:01,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:10:01,707 INFO L87 Difference]: Start difference. First operand 43844 states and 171173 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) [2021-06-05 07:10:03,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:03,241 INFO L93 Difference]: Finished difference Result 76528 states and 283739 transitions. [2021-06-05 07:10:03,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 07:10:03,242 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 [2021-06-05 07:10:03,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:03,503 INFO L225 Difference]: With dead ends: 76528 [2021-06-05 07:10:03,503 INFO L226 Difference]: Without dead ends: 76528 [2021-06-05 07:10:03,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 655.3ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 07:10:03,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76528 states. [2021-06-05 07:10:04,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76528 to 43841. [2021-06-05 07:10:04,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43841 states, 43840 states have (on average 3.9041742700729927) internal successors, (171159), 43840 states have internal predecessors, (171159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:05,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43841 states to 43841 states and 171159 transitions. [2021-06-05 07:10:05,062 INFO L78 Accepts]: Start accepts. Automaton has 43841 states and 171159 transitions. Word has length 28 [2021-06-05 07:10:05,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:05,062 INFO L482 AbstractCegarLoop]: Abstraction has 43841 states and 171159 transitions. [2021-06-05 07:10:05,062 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) [2021-06-05 07:10:05,062 INFO L276 IsEmpty]: Start isEmpty. Operand 43841 states and 171159 transitions. [2021-06-05 07:10:05,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:10:05,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:05,137 INFO L521 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] [2021-06-05 07:10:05,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable420,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:05,337 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:05,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:05,337 INFO L82 PathProgramCache]: Analyzing trace with hash 2039623402, now seen corresponding path program 142 times [2021-06-05 07:10:05,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:05,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85707150] [2021-06-05 07:10:05,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:05,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:05,376 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:05,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:05,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85707150] [2021-06-05 07:10:05,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85707150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:05,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829311997] [2021-06-05 07:10:05,376 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 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 [2021-06-05 07:10:05,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:10:05,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:05,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:10:05,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:05,491 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:05,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829311997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:05,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:05,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 07:10:05,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924340628] [2021-06-05 07:10:05,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:10:05,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:05,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:10:05,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:10:05,492 INFO L87 Difference]: Start difference. First operand 43841 states and 171159 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) [2021-06-05 07:10:07,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:07,068 INFO L93 Difference]: Finished difference Result 71140 states and 265637 transitions. [2021-06-05 07:10:07,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 07:10:07,069 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 [2021-06-05 07:10:07,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:07,289 INFO L225 Difference]: With dead ends: 71140 [2021-06-05 07:10:07,289 INFO L226 Difference]: Without dead ends: 71140 [2021-06-05 07:10:07,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 609.8ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 07:10:07,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71140 states. [2021-06-05 07:10:08,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71140 to 43865. [2021-06-05 07:10:08,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43865 states, 43864 states have (on average 3.9044090826190043) internal successors, (171263), 43864 states have internal predecessors, (171263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:08,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43865 states to 43865 states and 171263 transitions. [2021-06-05 07:10:08,966 INFO L78 Accepts]: Start accepts. Automaton has 43865 states and 171263 transitions. Word has length 28 [2021-06-05 07:10:08,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:08,966 INFO L482 AbstractCegarLoop]: Abstraction has 43865 states and 171263 transitions. [2021-06-05 07:10:08,966 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) [2021-06-05 07:10:08,966 INFO L276 IsEmpty]: Start isEmpty. Operand 43865 states and 171263 transitions. [2021-06-05 07:10:09,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:10:09,361 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:09,361 INFO L521 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] [2021-06-05 07:10:09,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-06-05 07:10:09,584 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:09,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:09,584 INFO L82 PathProgramCache]: Analyzing trace with hash 2120999490, now seen corresponding path program 143 times [2021-06-05 07:10:09,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:09,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522989473] [2021-06-05 07:10:09,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:09,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:09,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:09,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:09,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522989473] [2021-06-05 07:10:09,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522989473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:09,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465193323] [2021-06-05 07:10:09,633 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 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 [2021-06-05 07:10:09,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:10:09,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:09,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:10:09,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:09,745 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:09,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465193323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:09,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:09,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 07:10:09,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228228837] [2021-06-05 07:10:09,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:10:09,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:09,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:10:09,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:10:09,746 INFO L87 Difference]: Start difference. First operand 43865 states and 171263 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) [2021-06-05 07:10:10,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:10,858 INFO L93 Difference]: Finished difference Result 70268 states and 263382 transitions. [2021-06-05 07:10:10,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 07:10:10,859 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 [2021-06-05 07:10:10,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:11,055 INFO L225 Difference]: With dead ends: 70268 [2021-06-05 07:10:11,055 INFO L226 Difference]: Without dead ends: 70260 [2021-06-05 07:10:11,056 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 494.4ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 07:10:11,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70260 states. [2021-06-05 07:10:12,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70260 to 43865. [2021-06-05 07:10:12,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43865 states, 43864 states have (on average 3.904272296188218) internal successors, (171257), 43864 states have internal predecessors, (171257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:12,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43865 states to 43865 states and 171257 transitions. [2021-06-05 07:10:12,851 INFO L78 Accepts]: Start accepts. Automaton has 43865 states and 171257 transitions. Word has length 28 [2021-06-05 07:10:12,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:12,851 INFO L482 AbstractCegarLoop]: Abstraction has 43865 states and 171257 transitions. [2021-06-05 07:10:12,851 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) [2021-06-05 07:10:12,851 INFO L276 IsEmpty]: Start isEmpty. Operand 43865 states and 171257 transitions. [2021-06-05 07:10:12,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:10:12,934 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:12,934 INFO L521 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] [2021-06-05 07:10:13,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-06-05 07:10:13,135 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:13,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:13,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1243310590, now seen corresponding path program 144 times [2021-06-05 07:10:13,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:13,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67151839] [2021-06-05 07:10:13,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:13,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:13,169 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:13,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:13,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67151839] [2021-06-05 07:10:13,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67151839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:13,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356603872] [2021-06-05 07:10:13,169 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 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 [2021-06-05 07:10:13,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:10:13,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:13,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:10:13,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:13,303 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:13,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356603872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:13,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:13,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:10:13,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724401640] [2021-06-05 07:10:13,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:10:13,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:13,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:10:13,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:10:13,304 INFO L87 Difference]: Start difference. First operand 43865 states and 171257 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) [2021-06-05 07:10:14,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:14,497 INFO L93 Difference]: Finished difference Result 69775 states and 262075 transitions. [2021-06-05 07:10:14,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 07:10:14,498 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 [2021-06-05 07:10:14,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:15,051 INFO L225 Difference]: With dead ends: 69775 [2021-06-05 07:10:15,051 INFO L226 Difference]: Without dead ends: 69775 [2021-06-05 07:10:15,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 587.7ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 07:10:15,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69775 states. [2021-06-05 07:10:16,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69775 to 43873. [2021-06-05 07:10:16,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43873 states, 43872 states have (on average 3.9043353391684903) internal successors, (171291), 43872 states have internal predecessors, (171291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:16,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43873 states to 43873 states and 171291 transitions. [2021-06-05 07:10:16,505 INFO L78 Accepts]: Start accepts. Automaton has 43873 states and 171291 transitions. Word has length 28 [2021-06-05 07:10:16,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:16,505 INFO L482 AbstractCegarLoop]: Abstraction has 43873 states and 171291 transitions. [2021-06-05 07:10:16,505 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) [2021-06-05 07:10:16,505 INFO L276 IsEmpty]: Start isEmpty. Operand 43873 states and 171291 transitions. [2021-06-05 07:10:16,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:10:16,577 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:16,577 INFO L521 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] [2021-06-05 07:10:16,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-06-05 07:10:16,778 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:16,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:16,778 INFO L82 PathProgramCache]: Analyzing trace with hash 399728564, now seen corresponding path program 145 times [2021-06-05 07:10:16,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:16,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038723042] [2021-06-05 07:10:16,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:16,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:16,810 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:16,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:16,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038723042] [2021-06-05 07:10:16,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038723042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:16,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866171502] [2021-06-05 07:10:16,811 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 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 [2021-06-05 07:10:16,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:16,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:10:16,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:16,928 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:16,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866171502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:16,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:16,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:10:16,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388530620] [2021-06-05 07:10:16,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:10:16,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:16,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:10:16,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:10:16,929 INFO L87 Difference]: Start difference. First operand 43873 states and 171291 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) [2021-06-05 07:10:18,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:18,297 INFO L93 Difference]: Finished difference Result 69542 states and 261491 transitions. [2021-06-05 07:10:18,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 07:10:18,305 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 [2021-06-05 07:10:18,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:18,557 INFO L225 Difference]: With dead ends: 69542 [2021-06-05 07:10:18,558 INFO L226 Difference]: Without dead ends: 69534 [2021-06-05 07:10:18,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 490.3ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 07:10:18,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69534 states. [2021-06-05 07:10:19,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69534 to 43873. [2021-06-05 07:10:20,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43873 states, 43872 states have (on average 3.9042897520058353) internal successors, (171289), 43872 states have internal predecessors, (171289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:20,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43873 states to 43873 states and 171289 transitions. [2021-06-05 07:10:20,173 INFO L78 Accepts]: Start accepts. Automaton has 43873 states and 171289 transitions. Word has length 28 [2021-06-05 07:10:20,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:20,173 INFO L482 AbstractCegarLoop]: Abstraction has 43873 states and 171289 transitions. [2021-06-05 07:10:20,173 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) [2021-06-05 07:10:20,173 INFO L276 IsEmpty]: Start isEmpty. Operand 43873 states and 171289 transitions. [2021-06-05 07:10:20,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:10:20,241 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:20,241 INFO L521 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] [2021-06-05 07:10:20,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2021-06-05 07:10:20,445 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:20,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:20,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1403156548, now seen corresponding path program 146 times [2021-06-05 07:10:20,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:20,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921189284] [2021-06-05 07:10:20,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:20,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:20,481 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:20,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:20,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921189284] [2021-06-05 07:10:20,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921189284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:20,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622446263] [2021-06-05 07:10:20,481 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 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 [2021-06-05 07:10:20,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:10:20,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:20,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:10:20,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:20,585 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:20,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622446263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:20,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:20,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 07:10:20,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138651297] [2021-06-05 07:10:20,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:10:20,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:20,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:10:20,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:10:20,586 INFO L87 Difference]: Start difference. First operand 43873 states and 171289 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) [2021-06-05 07:10:22,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:22,062 INFO L93 Difference]: Finished difference Result 69043 states and 258242 transitions. [2021-06-05 07:10:22,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 07:10:22,062 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 [2021-06-05 07:10:22,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:22,276 INFO L225 Difference]: With dead ends: 69043 [2021-06-05 07:10:22,276 INFO L226 Difference]: Without dead ends: 69043 [2021-06-05 07:10:22,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 597.7ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 07:10:22,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69043 states. [2021-06-05 07:10:23,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69043 to 47103. [2021-06-05 07:10:23,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47103 states, 47102 states have (on average 3.907965691478069) internal successors, (184073), 47102 states have internal predecessors, (184073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:23,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47103 states to 47103 states and 184073 transitions. [2021-06-05 07:10:23,878 INFO L78 Accepts]: Start accepts. Automaton has 47103 states and 184073 transitions. Word has length 28 [2021-06-05 07:10:23,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:23,879 INFO L482 AbstractCegarLoop]: Abstraction has 47103 states and 184073 transitions. [2021-06-05 07:10:23,879 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) [2021-06-05 07:10:23,879 INFO L276 IsEmpty]: Start isEmpty. Operand 47103 states and 184073 transitions. [2021-06-05 07:10:23,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:10:23,956 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:23,956 INFO L521 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] [2021-06-05 07:10:24,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable425 [2021-06-05 07:10:24,156 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:24,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:24,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1484532636, now seen corresponding path program 147 times [2021-06-05 07:10:24,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:24,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148342402] [2021-06-05 07:10:24,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:24,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:24,188 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:24,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:24,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148342402] [2021-06-05 07:10:24,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148342402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:24,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808365813] [2021-06-05 07:10:24,189 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 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 [2021-06-05 07:10:24,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:10:24,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:24,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:10:24,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:24,287 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:24,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808365813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:24,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:24,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 07:10:24,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671967638] [2021-06-05 07:10:24,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:10:24,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:24,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:10:24,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:10:24,288 INFO L87 Difference]: Start difference. First operand 47103 states and 184073 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) [2021-06-05 07:10:25,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:25,596 INFO L93 Difference]: Finished difference Result 68545 states and 256931 transitions. [2021-06-05 07:10:25,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 07:10:25,597 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 [2021-06-05 07:10:25,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:25,787 INFO L225 Difference]: With dead ends: 68545 [2021-06-05 07:10:25,787 INFO L226 Difference]: Without dead ends: 68537 [2021-06-05 07:10:25,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 477.3ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 07:10:25,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68537 states. [2021-06-05 07:10:27,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68537 to 46797. [2021-06-05 07:10:27,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46797 states, 46796 states have (on average 3.913283186597145) internal successors, (183126), 46796 states have internal predecessors, (183126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:27,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46797 states to 46797 states and 183126 transitions. [2021-06-05 07:10:27,443 INFO L78 Accepts]: Start accepts. Automaton has 46797 states and 183126 transitions. Word has length 28 [2021-06-05 07:10:27,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:27,443 INFO L482 AbstractCegarLoop]: Abstraction has 46797 states and 183126 transitions. [2021-06-05 07:10:27,443 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) [2021-06-05 07:10:27,443 INFO L276 IsEmpty]: Start isEmpty. Operand 46797 states and 183126 transitions. [2021-06-05 07:10:27,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:10:27,520 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:27,520 INFO L521 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] [2021-06-05 07:10:27,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable426,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:27,721 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:27,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:27,721 INFO L82 PathProgramCache]: Analyzing trace with hash -30559336, now seen corresponding path program 148 times [2021-06-05 07:10:27,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:27,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581559110] [2021-06-05 07:10:27,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:27,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:27,753 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:27,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:27,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581559110] [2021-06-05 07:10:27,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581559110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:27,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691462329] [2021-06-05 07:10:27,753 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 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 [2021-06-05 07:10:27,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:10:27,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:27,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:10:27,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:27,855 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:27,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691462329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:27,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:27,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 07:10:27,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275355905] [2021-06-05 07:10:27,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:10:27,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:27,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:10:27,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:10:27,856 INFO L87 Difference]: Start difference. First operand 46797 states and 183126 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) [2021-06-05 07:10:28,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:28,993 INFO L93 Difference]: Finished difference Result 66948 states and 252499 transitions. [2021-06-05 07:10:28,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 07:10:28,993 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 [2021-06-05 07:10:28,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:29,184 INFO L225 Difference]: With dead ends: 66948 [2021-06-05 07:10:29,184 INFO L226 Difference]: Without dead ends: 66924 [2021-06-05 07:10:29,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 629.2ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:10:29,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66924 states. [2021-06-05 07:10:30,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66924 to 46693. [2021-06-05 07:10:30,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46693 states, 46692 states have (on average 3.9132613723978413) internal successors, (182718), 46692 states have internal predecessors, (182718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:30,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46693 states to 46693 states and 182718 transitions. [2021-06-05 07:10:30,748 INFO L78 Accepts]: Start accepts. Automaton has 46693 states and 182718 transitions. Word has length 28 [2021-06-05 07:10:30,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:30,748 INFO L482 AbstractCegarLoop]: Abstraction has 46693 states and 182718 transitions. [2021-06-05 07:10:30,748 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) [2021-06-05 07:10:30,748 INFO L276 IsEmpty]: Start isEmpty. Operand 46693 states and 182718 transitions. [2021-06-05 07:10:30,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:10:30,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:30,824 INFO L521 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] [2021-06-05 07:10:31,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:31,025 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:31,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:31,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1566567380, now seen corresponding path program 149 times [2021-06-05 07:10:31,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:31,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629190334] [2021-06-05 07:10:31,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:31,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:31,057 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:10:31,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:31,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629190334] [2021-06-05 07:10:31,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629190334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:31,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731288158] [2021-06-05 07:10:31,057 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 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 [2021-06-05 07:10:31,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:10:31,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:31,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:10:31,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:31,179 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:31,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731288158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:31,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:31,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:10:31,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682768866] [2021-06-05 07:10:31,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:10:31,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:31,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:10:31,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:10:31,180 INFO L87 Difference]: Start difference. First operand 46693 states and 182718 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) [2021-06-05 07:10:32,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:32,637 INFO L93 Difference]: Finished difference Result 68144 states and 255825 transitions. [2021-06-05 07:10:32,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 07:10:32,637 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 [2021-06-05 07:10:32,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:32,838 INFO L225 Difference]: With dead ends: 68144 [2021-06-05 07:10:32,838 INFO L226 Difference]: Without dead ends: 68144 [2021-06-05 07:10:32,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 588.4ms TimeCoverageRelationStatistics Valid=878, Invalid=3412, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 07:10:32,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68144 states. [2021-06-05 07:10:34,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68144 to 46789. [2021-06-05 07:10:34,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46789 states, 46788 states have (on average 3.9119432333076856) internal successors, (183032), 46788 states have internal predecessors, (183032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:34,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46789 states to 46789 states and 183032 transitions. [2021-06-05 07:10:34,450 INFO L78 Accepts]: Start accepts. Automaton has 46789 states and 183032 transitions. Word has length 28 [2021-06-05 07:10:34,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:34,450 INFO L482 AbstractCegarLoop]: Abstraction has 46789 states and 183032 transitions. [2021-06-05 07:10:34,450 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) [2021-06-05 07:10:34,450 INFO L276 IsEmpty]: Start isEmpty. Operand 46789 states and 183032 transitions. [2021-06-05 07:10:34,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:10:34,525 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:34,525 INFO L521 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] [2021-06-05 07:10:34,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:34,729 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:34,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:34,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1085360762, now seen corresponding path program 150 times [2021-06-05 07:10:34,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:34,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414365631] [2021-06-05 07:10:34,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:34,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:34,761 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:10:34,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:34,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414365631] [2021-06-05 07:10:34,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414365631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:34,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984470312] [2021-06-05 07:10:34,762 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 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 [2021-06-05 07:10:35,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:10:35,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:35,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:10:35,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:35,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:35,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984470312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:35,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:35,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:10:35,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97245033] [2021-06-05 07:10:35,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:10:35,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:35,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:10:35,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:10:35,215 INFO L87 Difference]: Start difference. First operand 46789 states and 183032 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) [2021-06-05 07:10:36,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:36,267 INFO L93 Difference]: Finished difference Result 67704 states and 254569 transitions. [2021-06-05 07:10:36,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 07:10:36,268 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 [2021-06-05 07:10:36,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:36,451 INFO L225 Difference]: With dead ends: 67704 [2021-06-05 07:10:36,451 INFO L226 Difference]: Without dead ends: 67696 [2021-06-05 07:10:36,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1136 ImplicationChecksByTransitivity, 484.5ms TimeCoverageRelationStatistics Valid=716, Invalid=2590, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 07:10:36,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67696 states. [2021-06-05 07:10:37,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67696 to 46721. [2021-06-05 07:10:37,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46721 states, 46720 states have (on average 3.913099315068493) internal successors, (182820), 46720 states have internal predecessors, (182820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:38,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46721 states to 46721 states and 182820 transitions. [2021-06-05 07:10:38,348 INFO L78 Accepts]: Start accepts. Automaton has 46721 states and 182820 transitions. Word has length 28 [2021-06-05 07:10:38,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:38,348 INFO L482 AbstractCegarLoop]: Abstraction has 46721 states and 182820 transitions. [2021-06-05 07:10:38,348 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) [2021-06-05 07:10:38,348 INFO L276 IsEmpty]: Start isEmpty. Operand 46721 states and 182820 transitions. [2021-06-05 07:10:38,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:10:38,438 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:38,438 INFO L521 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] [2021-06-05 07:10:38,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:38,638 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:38,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:38,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1942149356, now seen corresponding path program 151 times [2021-06-05 07:10:38,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:38,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232022105] [2021-06-05 07:10:38,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:38,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:38,671 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:10:38,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:38,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232022105] [2021-06-05 07:10:38,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232022105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:38,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152586896] [2021-06-05 07:10:38,671 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 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 [2021-06-05 07:10:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:38,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:10:38,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:38,785 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:38,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152586896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:38,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:38,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 07:10:38,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513077994] [2021-06-05 07:10:38,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:10:38,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:38,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:10:38,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:10:38,786 INFO L87 Difference]: Start difference. First operand 46721 states and 182820 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) [2021-06-05 07:10:39,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:39,626 INFO L93 Difference]: Finished difference Result 66435 states and 251058 transitions. [2021-06-05 07:10:39,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 07:10:39,627 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 [2021-06-05 07:10:39,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:39,815 INFO L225 Difference]: With dead ends: 66435 [2021-06-05 07:10:39,816 INFO L226 Difference]: Without dead ends: 66411 [2021-06-05 07:10:39,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 359.7ms TimeCoverageRelationStatistics Valid=487, Invalid=1675, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:10:39,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66411 states. [2021-06-05 07:10:41,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66411 to 46697. [2021-06-05 07:10:41,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46697 states, 46696 states have (on average 3.9132259722460168) internal successors, (182732), 46696 states have internal predecessors, (182732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:41,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46697 states to 46697 states and 182732 transitions. [2021-06-05 07:10:41,718 INFO L78 Accepts]: Start accepts. Automaton has 46697 states and 182732 transitions. Word has length 28 [2021-06-05 07:10:41,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:41,719 INFO L482 AbstractCegarLoop]: Abstraction has 46697 states and 182732 transitions. [2021-06-05 07:10:41,719 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) [2021-06-05 07:10:41,719 INFO L276 IsEmpty]: Start isEmpty. Operand 46697 states and 182732 transitions. [2021-06-05 07:10:41,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:10:41,807 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:41,807 INFO L521 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] [2021-06-05 07:10:42,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable430,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:42,007 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:42,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:42,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1119483464, now seen corresponding path program 152 times [2021-06-05 07:10:42,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:42,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471776538] [2021-06-05 07:10:42,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:42,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:42,045 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:42,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:42,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471776538] [2021-06-05 07:10:42,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471776538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:42,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805112998] [2021-06-05 07:10:42,045 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 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 [2021-06-05 07:10:42,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:10:42,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:42,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:10:42,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:42,140 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:42,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805112998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:42,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:42,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 07:10:42,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472854672] [2021-06-05 07:10:42,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:10:42,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:42,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:10:42,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:10:42,140 INFO L87 Difference]: Start difference. First operand 46697 states and 182732 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) [2021-06-05 07:10:43,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:43,665 INFO L93 Difference]: Finished difference Result 69974 states and 261149 transitions. [2021-06-05 07:10:43,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 07:10:43,666 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 [2021-06-05 07:10:43,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:43,856 INFO L225 Difference]: With dead ends: 69974 [2021-06-05 07:10:43,856 INFO L226 Difference]: Without dead ends: 69974 [2021-06-05 07:10:43,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 831.9ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 07:10:43,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69974 states. [2021-06-05 07:10:45,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69974 to 51465. [2021-06-05 07:10:45,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51465 states, 51464 states have (on average 3.864293486709156) internal successors, (198872), 51464 states have internal predecessors, (198872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:45,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51465 states to 51465 states and 198872 transitions. [2021-06-05 07:10:45,687 INFO L78 Accepts]: Start accepts. Automaton has 51465 states and 198872 transitions. Word has length 28 [2021-06-05 07:10:45,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:45,687 INFO L482 AbstractCegarLoop]: Abstraction has 51465 states and 198872 transitions. [2021-06-05 07:10:45,687 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) [2021-06-05 07:10:45,687 INFO L276 IsEmpty]: Start isEmpty. Operand 51465 states and 198872 transitions. [2021-06-05 07:10:45,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:10:45,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:45,768 INFO L521 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] [2021-06-05 07:10:45,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-06-05 07:10:45,969 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:45,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:45,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1200859552, now seen corresponding path program 153 times [2021-06-05 07:10:45,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:45,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017818938] [2021-06-05 07:10:45,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:45,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:46,006 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:46,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:46,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017818938] [2021-06-05 07:10:46,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017818938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:46,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121484736] [2021-06-05 07:10:46,006 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 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 [2021-06-05 07:10:46,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:10:46,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:46,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:10:46,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:46,098 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:46,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121484736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:46,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:46,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 07:10:46,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110355802] [2021-06-05 07:10:46,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:10:46,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:46,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:10:46,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:10:46,100 INFO L87 Difference]: Start difference. First operand 51465 states and 198872 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) [2021-06-05 07:10:47,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:47,744 INFO L93 Difference]: Finished difference Result 69176 states and 258972 transitions. [2021-06-05 07:10:47,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 07:10:47,745 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 [2021-06-05 07:10:47,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:48,010 INFO L225 Difference]: With dead ends: 69176 [2021-06-05 07:10:48,010 INFO L226 Difference]: Without dead ends: 69168 [2021-06-05 07:10:48,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1901 ImplicationChecksByTransitivity, 651.8ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 07:10:48,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69168 states. [2021-06-05 07:10:49,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69168 to 50301. [2021-06-05 07:10:49,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50301 states, 50300 states have (on average 3.8816302186878726) internal successors, (195246), 50300 states have internal predecessors, (195246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:49,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50301 states to 50301 states and 195246 transitions. [2021-06-05 07:10:49,700 INFO L78 Accepts]: Start accepts. Automaton has 50301 states and 195246 transitions. Word has length 28 [2021-06-05 07:10:49,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:49,700 INFO L482 AbstractCegarLoop]: Abstraction has 50301 states and 195246 transitions. [2021-06-05 07:10:49,700 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) [2021-06-05 07:10:49,700 INFO L276 IsEmpty]: Start isEmpty. Operand 50301 states and 195246 transitions. [2021-06-05 07:10:49,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:10:49,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:49,778 INFO L521 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] [2021-06-05 07:10:49,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-05 07:10:49,978 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:49,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:49,979 INFO L82 PathProgramCache]: Analyzing trace with hash -314232420, now seen corresponding path program 154 times [2021-06-05 07:10:49,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:49,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705313862] [2021-06-05 07:10:49,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:49,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:50,023 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:50,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:50,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705313862] [2021-06-05 07:10:50,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705313862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:50,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219296256] [2021-06-05 07:10:50,024 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:50,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:10:50,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:50,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:10:50,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:50,113 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:50,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219296256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:50,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:50,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 07:10:50,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871801639] [2021-06-05 07:10:50,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:10:50,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:50,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:10:50,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:10:50,113 INFO L87 Difference]: Start difference. First operand 50301 states and 195246 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) [2021-06-05 07:10:51,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:51,573 INFO L93 Difference]: Finished difference Result 67372 states and 253976 transitions. [2021-06-05 07:10:51,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 07:10:51,573 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 [2021-06-05 07:10:51,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:51,758 INFO L225 Difference]: With dead ends: 67372 [2021-06-05 07:10:51,758 INFO L226 Difference]: Without dead ends: 67348 [2021-06-05 07:10:51,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 565.5ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 07:10:51,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67348 states. [2021-06-05 07:10:53,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67348 to 50281. [2021-06-05 07:10:53,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50281 states, 50280 states have (on average 3.879912490055688) internal successors, (195082), 50280 states have internal predecessors, (195082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:53,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50281 states to 50281 states and 195082 transitions. [2021-06-05 07:10:53,391 INFO L78 Accepts]: Start accepts. Automaton has 50281 states and 195082 transitions. Word has length 28 [2021-06-05 07:10:53,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:53,391 INFO L482 AbstractCegarLoop]: Abstraction has 50281 states and 195082 transitions. [2021-06-05 07:10:53,391 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) [2021-06-05 07:10:53,391 INFO L276 IsEmpty]: Start isEmpty. Operand 50281 states and 195082 transitions. [2021-06-05 07:10:53,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:10:53,468 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:53,468 INFO L521 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] [2021-06-05 07:10:53,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-05 07:10:53,669 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:53,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:53,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1316197732, now seen corresponding path program 155 times [2021-06-05 07:10:53,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:53,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575298451] [2021-06-05 07:10:53,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:53,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:53,706 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:53,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:53,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575298451] [2021-06-05 07:10:53,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575298451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:53,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734752671] [2021-06-05 07:10:53,707 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 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 [2021-06-05 07:10:53,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:10:53,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:53,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:10:53,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:53,801 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:53,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734752671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:53,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:53,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 07:10:53,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211551967] [2021-06-05 07:10:53,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:10:53,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:53,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:10:53,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:10:53,802 INFO L87 Difference]: Start difference. First operand 50281 states and 195082 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) [2021-06-05 07:10:55,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:55,234 INFO L93 Difference]: Finished difference Result 68744 states and 257789 transitions. [2021-06-05 07:10:55,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 07:10:55,235 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 [2021-06-05 07:10:55,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:55,426 INFO L225 Difference]: With dead ends: 68744 [2021-06-05 07:10:55,426 INFO L226 Difference]: Without dead ends: 68704 [2021-06-05 07:10:55,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 517.8ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 07:10:55,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68704 states. [2021-06-05 07:10:56,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68704 to 50435. [2021-06-05 07:10:56,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50435 states, 50434 states have (on average 3.879267954157909) internal successors, (195647), 50434 states have internal predecessors, (195647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:57,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50435 states to 50435 states and 195647 transitions. [2021-06-05 07:10:57,074 INFO L78 Accepts]: Start accepts. Automaton has 50435 states and 195647 transitions. Word has length 28 [2021-06-05 07:10:57,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:57,074 INFO L482 AbstractCegarLoop]: Abstraction has 50435 states and 195647 transitions. [2021-06-05 07:10:57,074 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) [2021-06-05 07:10:57,074 INFO L276 IsEmpty]: Start isEmpty. Operand 50435 states and 195647 transitions. [2021-06-05 07:10:57,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:10:57,156 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:57,156 INFO L521 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] [2021-06-05 07:10:57,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:57,357 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:57,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:57,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1262992088, now seen corresponding path program 156 times [2021-06-05 07:10:57,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:57,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804616270] [2021-06-05 07:10:57,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:57,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:57,396 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:57,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:57,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804616270] [2021-06-05 07:10:57,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804616270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:57,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994694031] [2021-06-05 07:10:57,396 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 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 [2021-06-05 07:10:57,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:10:57,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:57,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:10:57,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:57,522 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:57,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994694031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:57,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:57,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 07:10:57,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320795991] [2021-06-05 07:10:57,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:10:57,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:57,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:10:57,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:10:57,523 INFO L87 Difference]: Start difference. First operand 50435 states and 195647 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) [2021-06-05 07:10:59,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:59,308 INFO L93 Difference]: Finished difference Result 67858 states and 255155 transitions. [2021-06-05 07:10:59,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 07:10:59,309 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 [2021-06-05 07:10:59,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:59,492 INFO L225 Difference]: With dead ends: 67858 [2021-06-05 07:10:59,492 INFO L226 Difference]: Without dead ends: 67858 [2021-06-05 07:10:59,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 834.2ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 07:10:59,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67858 states. [2021-06-05 07:11:01,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67858 to 51340. [2021-06-05 07:11:01,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51340 states, 51339 states have (on average 3.870702584779602) internal successors, (198718), 51339 states have internal predecessors, (198718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:01,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51340 states to 51340 states and 198718 transitions. [2021-06-05 07:11:01,288 INFO L78 Accepts]: Start accepts. Automaton has 51340 states and 198718 transitions. Word has length 28 [2021-06-05 07:11:01,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:01,289 INFO L482 AbstractCegarLoop]: Abstraction has 51340 states and 198718 transitions. [2021-06-05 07:11:01,289 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) [2021-06-05 07:11:01,289 INFO L276 IsEmpty]: Start isEmpty. Operand 51340 states and 198718 transitions. [2021-06-05 07:11:01,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:01,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:01,679 INFO L521 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] [2021-06-05 07:11:01,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-06-05 07:11:01,893 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:01,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:01,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1388936054, now seen corresponding path program 157 times [2021-06-05 07:11:01,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:01,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221647827] [2021-06-05 07:11:01,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:01,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:01,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:01,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:01,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221647827] [2021-06-05 07:11:01,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221647827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:01,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084323469] [2021-06-05 07:11:01,934 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 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 [2021-06-05 07:11:01,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:01,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:01,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:02,061 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:02,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084323469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:02,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:02,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 07:11:02,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207272979] [2021-06-05 07:11:02,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:11:02,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:02,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:11:02,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:11:02,062 INFO L87 Difference]: Start difference. First operand 51340 states and 198718 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) [2021-06-05 07:11:03,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:03,324 INFO L93 Difference]: Finished difference Result 67233 states and 253392 transitions. [2021-06-05 07:11:03,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 07:11:03,329 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 [2021-06-05 07:11:03,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:03,531 INFO L225 Difference]: With dead ends: 67233 [2021-06-05 07:11:03,531 INFO L226 Difference]: Without dead ends: 67225 [2021-06-05 07:11:03,532 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1732 ImplicationChecksByTransitivity, 670.3ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 07:11:03,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67225 states. [2021-06-05 07:11:04,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67225 to 51264. [2021-06-05 07:11:04,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51264 states, 51263 states have (on average 3.8718373875894896) internal successors, (198482), 51263 states have internal predecessors, (198482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:05,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51264 states to 51264 states and 198482 transitions. [2021-06-05 07:11:05,378 INFO L78 Accepts]: Start accepts. Automaton has 51264 states and 198482 transitions. Word has length 28 [2021-06-05 07:11:05,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:05,378 INFO L482 AbstractCegarLoop]: Abstraction has 51264 states and 198482 transitions. [2021-06-05 07:11:05,378 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) [2021-06-05 07:11:05,378 INFO L276 IsEmpty]: Start isEmpty. Operand 51264 states and 198482 transitions. [2021-06-05 07:11:05,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:05,460 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:05,460 INFO L521 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] [2021-06-05 07:11:05,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-06-05 07:11:05,661 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:05,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:05,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1638574064, now seen corresponding path program 158 times [2021-06-05 07:11:05,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:05,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166559036] [2021-06-05 07:11:05,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:05,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:05,698 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:05,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:05,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166559036] [2021-06-05 07:11:05,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166559036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:05,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605468218] [2021-06-05 07:11:05,699 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 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 [2021-06-05 07:11:05,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:11:05,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:05,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:05,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:05,810 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:05,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605468218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:05,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:05,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:11:05,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915854938] [2021-06-05 07:11:05,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:11:05,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:05,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:11:05,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:11:05,811 INFO L87 Difference]: Start difference. First operand 51264 states and 198482 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) [2021-06-05 07:11:06,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:06,942 INFO L93 Difference]: Finished difference Result 66710 states and 252146 transitions. [2021-06-05 07:11:06,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 07:11:06,942 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 [2021-06-05 07:11:06,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:07,132 INFO L225 Difference]: With dead ends: 66710 [2021-06-05 07:11:07,132 INFO L226 Difference]: Without dead ends: 66686 [2021-06-05 07:11:07,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 556.3ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 07:11:07,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66686 states. [2021-06-05 07:11:08,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66686 to 51250. [2021-06-05 07:11:08,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51250 states, 51249 states have (on average 3.8718218892075944) internal successors, (198427), 51249 states have internal predecessors, (198427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:09,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51250 states to 51250 states and 198427 transitions. [2021-06-05 07:11:09,005 INFO L78 Accepts]: Start accepts. Automaton has 51250 states and 198427 transitions. Word has length 28 [2021-06-05 07:11:09,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:09,005 INFO L482 AbstractCegarLoop]: Abstraction has 51250 states and 198427 transitions. [2021-06-05 07:11:09,005 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) [2021-06-05 07:11:09,005 INFO L276 IsEmpty]: Start isEmpty. Operand 51250 states and 198427 transitions. [2021-06-05 07:11:09,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:09,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:09,083 INFO L521 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] [2021-06-05 07:11:09,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-06-05 07:11:09,283 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:09,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:09,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1972807316, now seen corresponding path program 159 times [2021-06-05 07:11:09,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:09,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956755773] [2021-06-05 07:11:09,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:09,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:09,321 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:09,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:09,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956755773] [2021-06-05 07:11:09,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956755773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:09,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331662264] [2021-06-05 07:11:09,321 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 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 [2021-06-05 07:11:09,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:11:09,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:09,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:09,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:09,420 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:09,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331662264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:09,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:09,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 07:11:09,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256723636] [2021-06-05 07:11:09,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:11:09,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:09,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:11:09,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:11:09,421 INFO L87 Difference]: Start difference. First operand 51250 states and 198427 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) [2021-06-05 07:11:10,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:10,477 INFO L93 Difference]: Finished difference Result 66492 states and 251453 transitions. [2021-06-05 07:11:10,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 07:11:10,477 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 [2021-06-05 07:11:10,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:10,657 INFO L225 Difference]: With dead ends: 66492 [2021-06-05 07:11:10,658 INFO L226 Difference]: Without dead ends: 66452 [2021-06-05 07:11:10,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 515.8ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 07:11:10,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66452 states. [2021-06-05 07:11:12,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66452 to 51599. [2021-06-05 07:11:12,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51599 states, 51598 states have (on average 3.8733284235823096) internal successors, (199856), 51598 states have internal predecessors, (199856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:12,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51599 states to 51599 states and 199856 transitions. [2021-06-05 07:11:12,482 INFO L78 Accepts]: Start accepts. Automaton has 51599 states and 199856 transitions. Word has length 28 [2021-06-05 07:11:12,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:12,482 INFO L482 AbstractCegarLoop]: Abstraction has 51599 states and 199856 transitions. [2021-06-05 07:11:12,482 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) [2021-06-05 07:11:12,483 INFO L276 IsEmpty]: Start isEmpty. Operand 51599 states and 199856 transitions. [2021-06-05 07:11:12,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:12,562 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:12,562 INFO L521 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] [2021-06-05 07:11:12,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:12,763 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:12,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:12,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1825824890, now seen corresponding path program 160 times [2021-06-05 07:11:12,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:12,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389966110] [2021-06-05 07:11:12,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:12,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:12,800 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:12,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:12,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389966110] [2021-06-05 07:11:12,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389966110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:12,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564082047] [2021-06-05 07:11:12,801 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 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 [2021-06-05 07:11:12,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:11:12,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:12,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:12,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:12,915 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:12,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564082047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:12,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:12,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:11:12,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488078495] [2021-06-05 07:11:12,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:11:12,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:12,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:11:12,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:11:12,916 INFO L87 Difference]: Start difference. First operand 51599 states and 199856 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) [2021-06-05 07:11:14,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:14,161 INFO L93 Difference]: Finished difference Result 80755 states and 301894 transitions. [2021-06-05 07:11:14,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 07:11:14,161 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 [2021-06-05 07:11:14,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:14,783 INFO L225 Difference]: With dead ends: 80755 [2021-06-05 07:11:14,783 INFO L226 Difference]: Without dead ends: 80755 [2021-06-05 07:11:14,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 592.3ms TimeCoverageRelationStatistics Valid=901, Invalid=3131, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 07:11:14,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80755 states. [2021-06-05 07:11:16,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80755 to 52765. [2021-06-05 07:11:16,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52765 states, 52764 states have (on average 3.885433249943143) internal successors, (205011), 52764 states have internal predecessors, (205011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:16,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52765 states to 52765 states and 205011 transitions. [2021-06-05 07:11:16,510 INFO L78 Accepts]: Start accepts. Automaton has 52765 states and 205011 transitions. Word has length 28 [2021-06-05 07:11:16,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:16,510 INFO L482 AbstractCegarLoop]: Abstraction has 52765 states and 205011 transitions. [2021-06-05 07:11:16,511 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) [2021-06-05 07:11:16,511 INFO L276 IsEmpty]: Start isEmpty. Operand 52765 states and 205011 transitions. [2021-06-05 07:11:16,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:16,592 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:16,592 INFO L521 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] [2021-06-05 07:11:16,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:16,792 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:16,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:16,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1151103012, now seen corresponding path program 161 times [2021-06-05 07:11:16,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:16,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827619682] [2021-06-05 07:11:16,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:16,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:16,832 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:16,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:16,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827619682] [2021-06-05 07:11:16,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827619682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:16,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712520131] [2021-06-05 07:11:16,832 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 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 [2021-06-05 07:11:16,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:11:16,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:16,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:16,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:16,962 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:16,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712520131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:16,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:16,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:11:16,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39044885] [2021-06-05 07:11:16,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:11:16,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:16,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:11:16,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:11:16,963 INFO L87 Difference]: Start difference. First operand 52765 states and 205011 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) [2021-06-05 07:11:18,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:18,503 INFO L93 Difference]: Finished difference Result 73770 states and 279838 transitions. [2021-06-05 07:11:18,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 07:11:18,504 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 [2021-06-05 07:11:18,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:18,707 INFO L225 Difference]: With dead ends: 73770 [2021-06-05 07:11:18,708 INFO L226 Difference]: Without dead ends: 73770 [2021-06-05 07:11:18,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 539.7ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 07:11:18,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73770 states. [2021-06-05 07:11:20,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73770 to 52795. [2021-06-05 07:11:20,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52795 states, 52794 states have (on average 3.8852521119824224) internal successors, (205118), 52794 states have internal predecessors, (205118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:20,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52795 states to 52795 states and 205118 transitions. [2021-06-05 07:11:20,437 INFO L78 Accepts]: Start accepts. Automaton has 52795 states and 205118 transitions. Word has length 28 [2021-06-05 07:11:20,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:20,437 INFO L482 AbstractCegarLoop]: Abstraction has 52795 states and 205118 transitions. [2021-06-05 07:11:20,437 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) [2021-06-05 07:11:20,437 INFO L276 IsEmpty]: Start isEmpty. Operand 52795 states and 205118 transitions. [2021-06-05 07:11:20,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:20,520 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:20,520 INFO L521 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] [2021-06-05 07:11:20,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:20,720 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:20,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:20,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1490504108, now seen corresponding path program 162 times [2021-06-05 07:11:20,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:20,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233052563] [2021-06-05 07:11:20,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:20,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:20,757 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:20,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:20,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233052563] [2021-06-05 07:11:20,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233052563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:20,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102125989] [2021-06-05 07:11:20,757 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 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 [2021-06-05 07:11:20,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:11:20,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:20,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:20,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:20,880 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:20,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102125989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:20,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:20,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 07:11:20,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869943991] [2021-06-05 07:11:20,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:11:20,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:20,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:11:20,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:11:20,881 INFO L87 Difference]: Start difference. First operand 52795 states and 205118 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) [2021-06-05 07:11:22,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:22,774 INFO L93 Difference]: Finished difference Result 74806 states and 282789 transitions. [2021-06-05 07:11:22,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 07:11:22,774 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 [2021-06-05 07:11:22,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:22,983 INFO L225 Difference]: With dead ends: 74806 [2021-06-05 07:11:22,983 INFO L226 Difference]: Without dead ends: 74806 [2021-06-05 07:11:22,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 1179.5ms TimeCoverageRelationStatistics Valid=1557, Invalid=5925, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 07:11:23,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74806 states. [2021-06-05 07:11:24,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74806 to 53059. [2021-06-05 07:11:24,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53059 states, 53058 states have (on average 3.882091296317238) internal successors, (205976), 53058 states have internal predecessors, (205976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:24,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53059 states to 53059 states and 205976 transitions. [2021-06-05 07:11:24,952 INFO L78 Accepts]: Start accepts. Automaton has 53059 states and 205976 transitions. Word has length 28 [2021-06-05 07:11:24,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:24,952 INFO L482 AbstractCegarLoop]: Abstraction has 53059 states and 205976 transitions. [2021-06-05 07:11:24,952 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) [2021-06-05 07:11:24,952 INFO L276 IsEmpty]: Start isEmpty. Operand 53059 states and 205976 transitions. [2021-06-05 07:11:25,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:25,025 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:25,025 INFO L521 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] [2021-06-05 07:11:25,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-06-05 07:11:25,229 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:25,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:25,229 INFO L82 PathProgramCache]: Analyzing trace with hash 152535046, now seen corresponding path program 163 times [2021-06-05 07:11:25,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:25,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092986203] [2021-06-05 07:11:25,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:25,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:25,266 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:25,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:25,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092986203] [2021-06-05 07:11:25,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092986203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:25,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184507420] [2021-06-05 07:11:25,266 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 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 [2021-06-05 07:11:25,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:25,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:25,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:25,384 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:25,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184507420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:25,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:25,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 07:11:25,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895614204] [2021-06-05 07:11:25,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:11:25,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:25,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:11:25,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:11:25,385 INFO L87 Difference]: Start difference. First operand 53059 states and 205976 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) [2021-06-05 07:11:26,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:26,741 INFO L93 Difference]: Finished difference Result 73815 states and 279970 transitions. [2021-06-05 07:11:26,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 07:11:26,741 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 [2021-06-05 07:11:26,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:26,940 INFO L225 Difference]: With dead ends: 73815 [2021-06-05 07:11:26,940 INFO L226 Difference]: Without dead ends: 73811 [2021-06-05 07:11:26,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1783 ImplicationChecksByTransitivity, 692.9ms TimeCoverageRelationStatistics Valid=1139, Invalid=3831, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 07:11:27,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73811 states. [2021-06-05 07:11:28,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73811 to 52695. [2021-06-05 07:11:28,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52695 states, 52694 states have (on average 3.8854518541010363) internal successors, (204740), 52694 states have internal predecessors, (204740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:28,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52695 states to 52695 states and 204740 transitions. [2021-06-05 07:11:28,831 INFO L78 Accepts]: Start accepts. Automaton has 52695 states and 204740 transitions. Word has length 28 [2021-06-05 07:11:28,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:28,831 INFO L482 AbstractCegarLoop]: Abstraction has 52695 states and 204740 transitions. [2021-06-05 07:11:28,832 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) [2021-06-05 07:11:28,832 INFO L276 IsEmpty]: Start isEmpty. Operand 52695 states and 204740 transitions. [2021-06-05 07:11:28,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:28,911 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:28,911 INFO L521 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] [2021-06-05 07:11:29,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-06-05 07:11:29,111 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:29,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:29,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1936993134, now seen corresponding path program 164 times [2021-06-05 07:11:29,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:29,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669027705] [2021-06-05 07:11:29,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:29,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:29,148 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:29,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:29,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669027705] [2021-06-05 07:11:29,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669027705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:29,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652177314] [2021-06-05 07:11:29,149 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 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 [2021-06-05 07:11:29,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:11:29,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:29,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:29,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:29,257 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:29,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652177314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:29,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:29,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:11:29,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271539357] [2021-06-05 07:11:29,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:11:29,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:29,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:11:29,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:11:29,258 INFO L87 Difference]: Start difference. First operand 52695 states and 204740 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) [2021-06-05 07:11:30,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:30,140 INFO L93 Difference]: Finished difference Result 67805 states and 258963 transitions. [2021-06-05 07:11:30,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 07:11:30,140 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 [2021-06-05 07:11:30,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:30,323 INFO L225 Difference]: With dead ends: 67805 [2021-06-05 07:11:30,323 INFO L226 Difference]: Without dead ends: 67805 [2021-06-05 07:11:30,324 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 453.5ms TimeCoverageRelationStatistics Valid=608, Invalid=2148, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 07:11:30,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67805 states. [2021-06-05 07:11:32,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67805 to 52711. [2021-06-05 07:11:32,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52711 states, 52710 states have (on average 3.887080250426864) internal successors, (204888), 52710 states have internal predecessors, (204888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:32,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52711 states to 52711 states and 204888 transitions. [2021-06-05 07:11:32,226 INFO L78 Accepts]: Start accepts. Automaton has 52711 states and 204888 transitions. Word has length 28 [2021-06-05 07:11:32,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:32,226 INFO L482 AbstractCegarLoop]: Abstraction has 52711 states and 204888 transitions. [2021-06-05 07:11:32,226 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) [2021-06-05 07:11:32,226 INFO L276 IsEmpty]: Start isEmpty. Operand 52711 states and 204888 transitions. [2021-06-05 07:11:32,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:32,306 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:32,306 INFO L521 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] [2021-06-05 07:11:32,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-06-05 07:11:32,507 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:32,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:32,507 INFO L82 PathProgramCache]: Analyzing trace with hash -756673454, now seen corresponding path program 165 times [2021-06-05 07:11:32,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:32,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053871712] [2021-06-05 07:11:32,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:32,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:32,544 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:32,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:32,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053871712] [2021-06-05 07:11:32,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053871712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:32,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396362206] [2021-06-05 07:11:32,544 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 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 [2021-06-05 07:11:32,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:11:32,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:32,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:32,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:32,648 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:32,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396362206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:32,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:32,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:11:32,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846792865] [2021-06-05 07:11:32,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:11:32,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:32,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:11:32,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:11:32,649 INFO L87 Difference]: Start difference. First operand 52711 states and 204888 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) [2021-06-05 07:11:33,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:33,439 INFO L93 Difference]: Finished difference Result 66995 states and 256734 transitions. [2021-06-05 07:11:33,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:11:33,442 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 [2021-06-05 07:11:33,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:33,670 INFO L225 Difference]: With dead ends: 66995 [2021-06-05 07:11:33,670 INFO L226 Difference]: Without dead ends: 66983 [2021-06-05 07:11:33,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 346.4ms TimeCoverageRelationStatistics Valid=448, Invalid=1532, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 07:11:33,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66983 states. [2021-06-05 07:11:35,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66983 to 52645. [2021-06-05 07:11:35,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52645 states, 52644 states have (on average 3.8880974090114733) internal successors, (204685), 52644 states have internal predecessors, (204685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:35,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52645 states to 52645 states and 204685 transitions. [2021-06-05 07:11:35,758 INFO L78 Accepts]: Start accepts. Automaton has 52645 states and 204685 transitions. Word has length 28 [2021-06-05 07:11:35,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:35,758 INFO L482 AbstractCegarLoop]: Abstraction has 52645 states and 204685 transitions. [2021-06-05 07:11:35,758 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) [2021-06-05 07:11:35,758 INFO L276 IsEmpty]: Start isEmpty. Operand 52645 states and 204685 transitions. [2021-06-05 07:11:35,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:35,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:35,841 INFO L521 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] [2021-06-05 07:11:36,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-05 07:11:36,041 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:36,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:36,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1537074702, now seen corresponding path program 166 times [2021-06-05 07:11:36,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:36,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488446181] [2021-06-05 07:11:36,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:36,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:36,081 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:36,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:36,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488446181] [2021-06-05 07:11:36,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488446181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:36,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436474570] [2021-06-05 07:11:36,081 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 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 [2021-06-05 07:11:36,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:11:36,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:36,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:36,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:36,193 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:36,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436474570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:36,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:36,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:11:36,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777878984] [2021-06-05 07:11:36,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:11:36,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:36,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:11:36,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:11:36,194 INFO L87 Difference]: Start difference. First operand 52645 states and 204685 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) [2021-06-05 07:11:36,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:36,869 INFO L93 Difference]: Finished difference Result 57259 states and 219875 transitions. [2021-06-05 07:11:36,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:11:36,870 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 [2021-06-05 07:11:36,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:37,027 INFO L225 Difference]: With dead ends: 57259 [2021-06-05 07:11:37,027 INFO L226 Difference]: Without dead ends: 57259 [2021-06-05 07:11:37,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 307.6ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:11:37,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57259 states. [2021-06-05 07:11:38,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57259 to 52853. [2021-06-05 07:11:38,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52853 states, 52852 states have (on average 3.8858888972981154) internal successors, (205377), 52852 states have internal predecessors, (205377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:38,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52853 states to 52853 states and 205377 transitions. [2021-06-05 07:11:38,931 INFO L78 Accepts]: Start accepts. Automaton has 52853 states and 205377 transitions. Word has length 28 [2021-06-05 07:11:38,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:38,931 INFO L482 AbstractCegarLoop]: Abstraction has 52853 states and 205377 transitions. [2021-06-05 07:11:38,931 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) [2021-06-05 07:11:38,932 INFO L276 IsEmpty]: Start isEmpty. Operand 52853 states and 205377 transitions. [2021-06-05 07:11:39,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:39,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:39,023 INFO L521 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] [2021-06-05 07:11:39,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-06-05 07:11:39,224 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:39,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:39,224 INFO L82 PathProgramCache]: Analyzing trace with hash 538506736, now seen corresponding path program 167 times [2021-06-05 07:11:39,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:39,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057812396] [2021-06-05 07:11:39,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:39,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:39,258 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:39,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:39,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057812396] [2021-06-05 07:11:39,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057812396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:39,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809739427] [2021-06-05 07:11:39,258 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 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 [2021-06-05 07:11:39,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:11:39,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:39,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:39,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:39,364 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:39,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809739427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:39,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:39,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 07:11:39,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703612219] [2021-06-05 07:11:39,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:11:39,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:39,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:11:39,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:11:39,365 INFO L87 Difference]: Start difference. First operand 52853 states and 205377 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) [2021-06-05 07:11:39,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:39,984 INFO L93 Difference]: Finished difference Result 57070 states and 219367 transitions. [2021-06-05 07:11:39,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:11:39,985 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 [2021-06-05 07:11:39,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:40,149 INFO L225 Difference]: With dead ends: 57070 [2021-06-05 07:11:40,149 INFO L226 Difference]: Without dead ends: 57066 [2021-06-05 07:11:40,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 248.0ms TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:11:40,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57066 states. [2021-06-05 07:11:41,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57066 to 52793. [2021-06-05 07:11:41,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52793 states, 52792 states have (on average 3.886668434611305) internal successors, (205185), 52792 states have internal predecessors, (205185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:41,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52793 states to 52793 states and 205185 transitions. [2021-06-05 07:11:41,649 INFO L78 Accepts]: Start accepts. Automaton has 52793 states and 205185 transitions. Word has length 28 [2021-06-05 07:11:41,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:41,649 INFO L482 AbstractCegarLoop]: Abstraction has 52793 states and 205185 transitions. [2021-06-05 07:11:41,649 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) [2021-06-05 07:11:41,649 INFO L276 IsEmpty]: Start isEmpty. Operand 52793 states and 205185 transitions. [2021-06-05 07:11:41,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:41,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:41,734 INFO L521 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] [2021-06-05 07:11:41,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:41,934 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:41,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:41,935 INFO L82 PathProgramCache]: Analyzing trace with hash 508703680, now seen corresponding path program 87 times [2021-06-05 07:11:41,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:41,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804193610] [2021-06-05 07:11:41,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:41,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:41,972 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:41,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:41,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804193610] [2021-06-05 07:11:41,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804193610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:41,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851487169] [2021-06-05 07:11:41,973 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 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 [2021-06-05 07:11:41,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:11:41,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:41,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:41,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:42,050 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:42,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851487169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:42,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:42,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 07:11:42,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711747912] [2021-06-05 07:11:42,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:11:42,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:42,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:11:42,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:11:42,051 INFO L87 Difference]: Start difference. First operand 52793 states and 205185 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) [2021-06-05 07:11:42,521 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-05 07:11:42,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:42,897 INFO L93 Difference]: Finished difference Result 57147 states and 219589 transitions. [2021-06-05 07:11:42,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:11:42,899 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 [2021-06-05 07:11:42,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:43,060 INFO L225 Difference]: With dead ends: 57147 [2021-06-05 07:11:43,060 INFO L226 Difference]: Without dead ends: 57147 [2021-06-05 07:11:43,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 443.8ms TimeCoverageRelationStatistics Valid=275, Invalid=781, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:11:43,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57147 states. [2021-06-05 07:11:44,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57147 to 52913. [2021-06-05 07:11:44,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52913 states, 52912 states have (on average 3.8848087390384034) internal successors, (205553), 52912 states have internal predecessors, (205553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:44,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52913 states to 52913 states and 205553 transitions. [2021-06-05 07:11:44,508 INFO L78 Accepts]: Start accepts. Automaton has 52913 states and 205553 transitions. Word has length 28 [2021-06-05 07:11:44,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:44,509 INFO L482 AbstractCegarLoop]: Abstraction has 52913 states and 205553 transitions. [2021-06-05 07:11:44,509 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) [2021-06-05 07:11:44,509 INFO L276 IsEmpty]: Start isEmpty. Operand 52913 states and 205553 transitions. [2021-06-05 07:11:44,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:44,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:44,594 INFO L521 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] [2021-06-05 07:11:44,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-06-05 07:11:44,797 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:44,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:44,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1414052632, now seen corresponding path program 88 times [2021-06-05 07:11:44,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:44,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327437572] [2021-06-05 07:11:44,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:44,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:44,830 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:11:44,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:44,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327437572] [2021-06-05 07:11:44,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327437572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:44,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362479583] [2021-06-05 07:11:44,830 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 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 [2021-06-05 07:11:44,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:11:44,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:44,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:44,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:44,906 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:11:44,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362479583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:44,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:44,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 07:11:44,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820765607] [2021-06-05 07:11:44,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:11:44,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:44,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:11:44,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:11:44,907 INFO L87 Difference]: Start difference. First operand 52913 states and 205553 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) [2021-06-05 07:11:45,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:45,395 INFO L93 Difference]: Finished difference Result 57331 states and 220238 transitions. [2021-06-05 07:11:45,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:11:45,395 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 [2021-06-05 07:11:45,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:45,954 INFO L225 Difference]: With dead ends: 57331 [2021-06-05 07:11:45,955 INFO L226 Difference]: Without dead ends: 57319 [2021-06-05 07:11:45,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 141.8ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:11:46,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57319 states. [2021-06-05 07:11:47,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57319 to 53047. [2021-06-05 07:11:47,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53047 states, 53046 states have (on average 3.883195716924933) internal successors, (205988), 53046 states have internal predecessors, (205988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:47,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53047 states to 53047 states and 205988 transitions. [2021-06-05 07:11:47,443 INFO L78 Accepts]: Start accepts. Automaton has 53047 states and 205988 transitions. Word has length 28 [2021-06-05 07:11:47,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:47,443 INFO L482 AbstractCegarLoop]: Abstraction has 53047 states and 205988 transitions. [2021-06-05 07:11:47,444 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) [2021-06-05 07:11:47,444 INFO L276 IsEmpty]: Start isEmpty. Operand 53047 states and 205988 transitions. [2021-06-05 07:11:47,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:47,530 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:47,530 INFO L521 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] [2021-06-05 07:11:47,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable448,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:47,731 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:47,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:47,731 INFO L82 PathProgramCache]: Analyzing trace with hash 421559068, now seen corresponding path program 89 times [2021-06-05 07:11:47,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:47,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037863680] [2021-06-05 07:11:47,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:47,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:47,769 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:47,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:47,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037863680] [2021-06-05 07:11:47,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037863680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:47,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73246567] [2021-06-05 07:11:47,769 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:47,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:11:47,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:47,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:47,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:47,847 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:47,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73246567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:47,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:47,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 07:11:47,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634844335] [2021-06-05 07:11:47,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:11:47,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:47,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:11:47,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:11:47,848 INFO L87 Difference]: Start difference. First operand 53047 states and 205988 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) [2021-06-05 07:11:48,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:48,376 INFO L93 Difference]: Finished difference Result 57295 states and 220154 transitions. [2021-06-05 07:11:48,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:11:48,377 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 [2021-06-05 07:11:48,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:48,549 INFO L225 Difference]: With dead ends: 57295 [2021-06-05 07:11:48,549 INFO L226 Difference]: Without dead ends: 57275 [2021-06-05 07:11:48,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 163.6ms TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-06-05 07:11:48,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57275 states. [2021-06-05 07:11:49,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57275 to 53047. [2021-06-05 07:11:49,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53047 states, 53046 states have (on average 3.883120310673755) internal successors, (205984), 53046 states have internal predecessors, (205984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:50,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53047 states to 53047 states and 205984 transitions. [2021-06-05 07:11:50,102 INFO L78 Accepts]: Start accepts. Automaton has 53047 states and 205984 transitions. Word has length 28 [2021-06-05 07:11:50,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:50,102 INFO L482 AbstractCegarLoop]: Abstraction has 53047 states and 205984 transitions. [2021-06-05 07:11:50,102 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) [2021-06-05 07:11:50,102 INFO L276 IsEmpty]: Start isEmpty. Operand 53047 states and 205984 transitions. [2021-06-05 07:11:50,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:50,501 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:50,501 INFO L521 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] [2021-06-05 07:11:50,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable449 [2021-06-05 07:11:50,723 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:50,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:50,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1989119940, now seen corresponding path program 168 times [2021-06-05 07:11:50,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:50,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746673346] [2021-06-05 07:11:50,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:50,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:50,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:50,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:50,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746673346] [2021-06-05 07:11:50,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746673346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:50,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136425803] [2021-06-05 07:11:50,760 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:50,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:11:50,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:50,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:11:50,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:50,849 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:50,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136425803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:50,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:50,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 07:11:50,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630861401] [2021-06-05 07:11:50,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:11:50,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:50,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:11:50,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:11:50,850 INFO L87 Difference]: Start difference. First operand 53047 states and 205984 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) [2021-06-05 07:11:51,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:51,374 INFO L93 Difference]: Finished difference Result 58008 states and 223549 transitions. [2021-06-05 07:11:51,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:11:51,374 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 [2021-06-05 07:11:51,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:51,537 INFO L225 Difference]: With dead ends: 58008 [2021-06-05 07:11:51,537 INFO L226 Difference]: Without dead ends: 57995 [2021-06-05 07:11:51,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 129.2ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:11:51,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57995 states. [2021-06-05 07:11:52,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57995 to 55780. [2021-06-05 07:11:52,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55780 states, 55779 states have (on average 3.8898510192007745) internal successors, (216972), 55779 states have internal predecessors, (216972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:53,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55780 states to 55780 states and 216972 transitions. [2021-06-05 07:11:53,028 INFO L78 Accepts]: Start accepts. Automaton has 55780 states and 216972 transitions. Word has length 28 [2021-06-05 07:11:53,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:53,028 INFO L482 AbstractCegarLoop]: Abstraction has 55780 states and 216972 transitions. [2021-06-05 07:11:53,028 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) [2021-06-05 07:11:53,028 INFO L276 IsEmpty]: Start isEmpty. Operand 55780 states and 216972 transitions. [2021-06-05 07:11:53,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:53,131 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:53,131 INFO L521 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] [2021-06-05 07:11:53,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:53,331 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:53,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:53,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1306375610, now seen corresponding path program 169 times [2021-06-05 07:11:53,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:53,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695788355] [2021-06-05 07:11:53,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:53,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:53,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:53,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:53,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695788355] [2021-06-05 07:11:53,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695788355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:53,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565631146] [2021-06-05 07:11:53,372 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:53,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:53,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:11:53,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:53,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:53,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565631146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:53,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:53,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 07:11:53,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052888122] [2021-06-05 07:11:53,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:11:53,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:53,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:11:53,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:11:53,459 INFO L87 Difference]: Start difference. First operand 55780 states and 216972 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) [2021-06-05 07:11:54,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:54,330 INFO L93 Difference]: Finished difference Result 61738 states and 236391 transitions. [2021-06-05 07:11:54,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:11:54,330 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 [2021-06-05 07:11:54,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:54,501 INFO L225 Difference]: With dead ends: 61738 [2021-06-05 07:11:54,502 INFO L226 Difference]: Without dead ends: 61738 [2021-06-05 07:11:54,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 162.0ms TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:11:54,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61738 states. [2021-06-05 07:11:55,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61738 to 49367. [2021-06-05 07:11:55,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49367 states, 49366 states have (on average 3.878924766033302) internal successors, (191487), 49366 states have internal predecessors, (191487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:55,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49367 states to 49367 states and 191487 transitions. [2021-06-05 07:11:55,916 INFO L78 Accepts]: Start accepts. Automaton has 49367 states and 191487 transitions. Word has length 28 [2021-06-05 07:11:55,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:55,916 INFO L482 AbstractCegarLoop]: Abstraction has 49367 states and 191487 transitions. [2021-06-05 07:11:55,917 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) [2021-06-05 07:11:55,917 INFO L276 IsEmpty]: Start isEmpty. Operand 49367 states and 191487 transitions. [2021-06-05 07:11:55,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:55,995 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:55,995 INFO L521 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] [2021-06-05 07:11:56,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:56,195 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:56,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:56,196 INFO L82 PathProgramCache]: Analyzing trace with hash 986257146, now seen corresponding path program 170 times [2021-06-05 07:11:56,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:56,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577543492] [2021-06-05 07:11:56,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:56,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:56,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:56,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:56,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577543492] [2021-06-05 07:11:56,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577543492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:56,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969914426] [2021-06-05 07:11:56,230 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:56,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:11:56,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:56,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:11:56,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:56,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:56,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969914426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:56,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:56,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 07:11:56,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658280329] [2021-06-05 07:11:56,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:11:56,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:56,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:11:56,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:11:56,318 INFO L87 Difference]: Start difference. First operand 49367 states and 191487 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) [2021-06-05 07:11:56,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:56,903 INFO L93 Difference]: Finished difference Result 54325 states and 208211 transitions. [2021-06-05 07:11:56,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:11:56,904 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 [2021-06-05 07:11:56,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:57,052 INFO L225 Difference]: With dead ends: 54325 [2021-06-05 07:11:57,052 INFO L226 Difference]: Without dead ends: 54325 [2021-06-05 07:11:57,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 206.0ms TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:11:57,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54325 states. [2021-06-05 07:11:58,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54325 to 50200. [2021-06-05 07:11:58,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50200 states, 50199 states have (on average 3.8774676786390168) internal successors, (194645), 50199 states have internal predecessors, (194645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:58,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50200 states to 50200 states and 194645 transitions. [2021-06-05 07:11:58,530 INFO L78 Accepts]: Start accepts. Automaton has 50200 states and 194645 transitions. Word has length 28 [2021-06-05 07:11:58,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:58,530 INFO L482 AbstractCegarLoop]: Abstraction has 50200 states and 194645 transitions. [2021-06-05 07:11:58,530 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) [2021-06-05 07:11:58,530 INFO L276 IsEmpty]: Start isEmpty. Operand 50200 states and 194645 transitions. [2021-06-05 07:11:58,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:58,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:58,968 INFO L521 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] [2021-06-05 07:11:59,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable452,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:59,181 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:59,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:59,181 INFO L82 PathProgramCache]: Analyzing trace with hash -22913030, now seen corresponding path program 171 times [2021-06-05 07:11:59,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:59,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965571579] [2021-06-05 07:11:59,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:59,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:59,221 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:59,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:59,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965571579] [2021-06-05 07:11:59,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965571579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:59,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890824173] [2021-06-05 07:11:59,221 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:59,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:11:59,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:59,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:11:59,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:59,305 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:59,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890824173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:59,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:59,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 07:11:59,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003194929] [2021-06-05 07:11:59,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:11:59,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:59,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:11:59,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:11:59,306 INFO L87 Difference]: Start difference. First operand 50200 states and 194645 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) [2021-06-05 07:11:59,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:59,789 INFO L93 Difference]: Finished difference Result 52033 states and 200786 transitions. [2021-06-05 07:11:59,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:11:59,789 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 [2021-06-05 07:11:59,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:59,937 INFO L225 Difference]: With dead ends: 52033 [2021-06-05 07:11:59,937 INFO L226 Difference]: Without dead ends: 52033 [2021-06-05 07:11:59,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 139.0ms TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:11:59,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52033 states. [2021-06-05 07:12:01,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52033 to 50208. [2021-06-05 07:12:01,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50208 states, 50207 states have (on average 3.8773278626486345) internal successors, (194669), 50207 states have internal predecessors, (194669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:01,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50208 states to 50208 states and 194669 transitions. [2021-06-05 07:12:01,244 INFO L78 Accepts]: Start accepts. Automaton has 50208 states and 194669 transitions. Word has length 28 [2021-06-05 07:12:01,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:01,244 INFO L482 AbstractCegarLoop]: Abstraction has 50208 states and 194669 transitions. [2021-06-05 07:12:01,244 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) [2021-06-05 07:12:01,244 INFO L276 IsEmpty]: Start isEmpty. Operand 50208 states and 194669 transitions. [2021-06-05 07:12:01,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:12:01,324 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:01,324 INFO L521 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] [2021-06-05 07:12:01,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-06-05 07:12:01,525 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:01,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:01,525 INFO L82 PathProgramCache]: Analyzing trace with hash -120181494, now seen corresponding path program 172 times [2021-06-05 07:12:01,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:01,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383012095] [2021-06-05 07:12:01,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:01,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:01,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:01,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:01,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383012095] [2021-06-05 07:12:01,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383012095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:01,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438161513] [2021-06-05 07:12:01,562 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 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:12:01,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:12:01,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:01,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:12:01,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:01,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:01,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438161513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:01,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:01,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 07:12:01,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024858519] [2021-06-05 07:12:01,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:12:01,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:01,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:12:01,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:12:01,651 INFO L87 Difference]: Start difference. First operand 50208 states and 194669 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) [2021-06-05 07:12:02,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:02,136 INFO L93 Difference]: Finished difference Result 51753 states and 199864 transitions. [2021-06-05 07:12:02,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 07:12:02,136 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 [2021-06-05 07:12:02,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:02,283 INFO L225 Difference]: With dead ends: 51753 [2021-06-05 07:12:02,283 INFO L226 Difference]: Without dead ends: 51753 [2021-06-05 07:12:02,283 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 139.1ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:12:02,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51753 states. [2021-06-05 07:12:03,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51753 to 50102. [2021-06-05 07:12:03,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50102 states, 50101 states have (on average 3.877068321989581) internal successors, (194245), 50101 states have internal predecessors, (194245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:04,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50102 states to 50102 states and 194245 transitions. [2021-06-05 07:12:04,040 INFO L78 Accepts]: Start accepts. Automaton has 50102 states and 194245 transitions. Word has length 28 [2021-06-05 07:12:04,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:04,040 INFO L482 AbstractCegarLoop]: Abstraction has 50102 states and 194245 transitions. [2021-06-05 07:12:04,040 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) [2021-06-05 07:12:04,040 INFO L276 IsEmpty]: Start isEmpty. Operand 50102 states and 194245 transitions. [2021-06-05 07:12:04,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:12:04,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:04,133 INFO L521 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] [2021-06-05 07:12:04,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable454,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:12:04,334 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:04,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:04,334 INFO L82 PathProgramCache]: Analyzing trace with hash -915745990, now seen corresponding path program 173 times [2021-06-05 07:12:04,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:04,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759295314] [2021-06-05 07:12:04,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:04,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:04,558 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:04,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:04,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759295314] [2021-06-05 07:12:04,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759295314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:04,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567573743] [2021-06-05 07:12:04,559 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 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:12:04,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:12:04,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:04,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 07:12:04,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:04,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:12:04,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:04,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:04,969 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 27 treesize of output 15 [2021-06-05 07:12:04,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:12:04,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:12:04,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:12:04,975 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:5 [2021-06-05 07:12:04,990 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:04,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567573743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:04,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:04,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 07:12:04,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787846269] [2021-06-05 07:12:04,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:12:04,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:04,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:12:04,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:12:04,991 INFO L87 Difference]: Start difference. First operand 50102 states and 194245 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:07,587 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-06-05 07:12:08,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:08,311 INFO L93 Difference]: Finished difference Result 58226 states and 218118 transitions. [2021-06-05 07:12:08,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:12:08,312 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:12:08,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:08,472 INFO L225 Difference]: With dead ends: 58226 [2021-06-05 07:12:08,472 INFO L226 Difference]: Without dead ends: 58196 [2021-06-05 07:12:08,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 2750.9ms TimeCoverageRelationStatistics Valid=432, Invalid=2430, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:12:08,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58196 states. [2021-06-05 07:12:09,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58196 to 50237. [2021-06-05 07:12:09,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50237 states, 50236 states have (on average 3.876303845847599) internal successors, (194730), 50236 states have internal predecessors, (194730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:09,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50237 states to 50237 states and 194730 transitions. [2021-06-05 07:12:09,753 INFO L78 Accepts]: Start accepts. Automaton has 50237 states and 194730 transitions. Word has length 30 [2021-06-05 07:12:09,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:09,753 INFO L482 AbstractCegarLoop]: Abstraction has 50237 states and 194730 transitions. [2021-06-05 07:12:09,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:09,754 INFO L276 IsEmpty]: Start isEmpty. Operand 50237 states and 194730 transitions. [2021-06-05 07:12:09,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:12:09,837 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:09,837 INFO L521 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] [2021-06-05 07:12:10,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-06-05 07:12:10,038 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:10,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:10,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1350823290, now seen corresponding path program 174 times [2021-06-05 07:12:10,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:10,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243511882] [2021-06-05 07:12:10,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:10,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:10,258 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:10,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:10,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243511882] [2021-06-05 07:12:10,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243511882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:10,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637007346] [2021-06-05 07:12:10,259 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 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:12:10,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:12:10,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:10,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 07:12:10,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:10,565 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-06-05 07:12:10,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 53 [2021-06-05 07:12:10,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:12:10,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:12:10,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:12:10,572 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:84, output treesize:5 [2021-06-05 07:12:10,590 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:10,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637007346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:10,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:10,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 07:12:10,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006001241] [2021-06-05 07:12:10,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:12:10,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:10,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:12:10,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:12:10,591 INFO L87 Difference]: Start difference. First operand 50237 states and 194730 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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) [2021-06-05 07:12:11,814 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-06-05 07:12:13,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:13,141 INFO L93 Difference]: Finished difference Result 58234 states and 218176 transitions. [2021-06-05 07:12:13,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 07:12:13,142 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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 30 [2021-06-05 07:12:13,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:13,302 INFO L225 Difference]: With dead ends: 58234 [2021-06-05 07:12:13,302 INFO L226 Difference]: Without dead ends: 58204 [2021-06-05 07:12:13,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 2068.0ms TimeCoverageRelationStatistics Valid=416, Invalid=1936, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:12:13,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58204 states. [2021-06-05 07:12:14,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58204 to 50243. [2021-06-05 07:12:14,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50243 states, 50242 states have (on average 3.8763385215556707) internal successors, (194755), 50242 states have internal predecessors, (194755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:14,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50243 states to 50243 states and 194755 transitions. [2021-06-05 07:12:14,632 INFO L78 Accepts]: Start accepts. Automaton has 50243 states and 194755 transitions. Word has length 30 [2021-06-05 07:12:14,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:14,632 INFO L482 AbstractCegarLoop]: Abstraction has 50243 states and 194755 transitions. [2021-06-05 07:12:14,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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) [2021-06-05 07:12:14,632 INFO L276 IsEmpty]: Start isEmpty. Operand 50243 states and 194755 transitions. [2021-06-05 07:12:14,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:12:14,718 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:14,718 INFO L521 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] [2021-06-05 07:12:14,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable456 [2021-06-05 07:12:14,918 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:14,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:14,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1352714698, now seen corresponding path program 175 times [2021-06-05 07:12:14,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:14,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011315480] [2021-06-05 07:12:14,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:14,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:15,218 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:15,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:15,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011315480] [2021-06-05 07:12:15,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011315480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:15,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704623796] [2021-06-05 07:12:15,219 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 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:12:15,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:15,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 07:12:15,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:15,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:15,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:15,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:15,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:12:15,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:15,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:12:15,450 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 29 treesize of output 15 [2021-06-05 07:12:15,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:12:15,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:12:15,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:12:15,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:5 [2021-06-05 07:12:15,472 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:15,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704623796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:15,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:15,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 07:12:15,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017373572] [2021-06-05 07:12:15,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:12:15,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:15,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:12:15,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:12:15,472 INFO L87 Difference]: Start difference. First operand 50243 states and 194755 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:17,070 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-06-05 07:12:17,714 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2021-06-05 07:12:18,164 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-06-05 07:12:19,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:19,463 INFO L93 Difference]: Finished difference Result 71226 states and 266663 transitions. [2021-06-05 07:12:19,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 07:12:19,463 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:12:19,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:19,651 INFO L225 Difference]: With dead ends: 71226 [2021-06-05 07:12:19,651 INFO L226 Difference]: Without dead ends: 71211 [2021-06-05 07:12:19,651 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 2989.3ms TimeCoverageRelationStatistics Valid=489, Invalid=3171, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 07:12:19,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71211 states. [2021-06-05 07:12:20,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71211 to 50282. [2021-06-05 07:12:20,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50282 states, 50281 states have (on average 3.8760764503490384) internal successors, (194893), 50281 states have internal predecessors, (194893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:21,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50282 states to 50282 states and 194893 transitions. [2021-06-05 07:12:21,020 INFO L78 Accepts]: Start accepts. Automaton has 50282 states and 194893 transitions. Word has length 30 [2021-06-05 07:12:21,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:21,020 INFO L482 AbstractCegarLoop]: Abstraction has 50282 states and 194893 transitions. [2021-06-05 07:12:21,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:21,021 INFO L276 IsEmpty]: Start isEmpty. Operand 50282 states and 194893 transitions. [2021-06-05 07:12:21,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:12:21,104 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:21,104 INFO L521 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] [2021-06-05 07:12:21,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable457,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:12:21,305 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:21,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:21,305 INFO L82 PathProgramCache]: Analyzing trace with hash -547667522, now seen corresponding path program 176 times [2021-06-05 07:12:21,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:21,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208452976] [2021-06-05 07:12:21,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:21,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:21,535 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:21,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:21,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208452976] [2021-06-05 07:12:21,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208452976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:21,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184863894] [2021-06-05 07:12:21,535 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 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:12:21,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:12:21,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:21,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 07:12:21,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:21,851 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:12:21,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-05 07:12:21,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:12:21,918 INFO L628 ElimStorePlain]: treesize reduction 51, result has 46.9 percent of original size [2021-06-05 07:12:21,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 07:12:21,931 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:108 [2021-06-05 07:12:22,009 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:22,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184863894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:22,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:22,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 07:12:22,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429533881] [2021-06-05 07:12:22,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:12:22,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:22,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:12:22,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:12:22,010 INFO L87 Difference]: Start difference. First operand 50282 states and 194893 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:23,380 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2021-06-05 07:12:24,096 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-06-05 07:12:24,506 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2021-06-05 07:12:24,899 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2021-06-05 07:12:25,089 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-05 07:12:25,219 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-06-05 07:12:26,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:26,476 INFO L93 Difference]: Finished difference Result 60601 states and 225495 transitions. [2021-06-05 07:12:26,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 07:12:26,477 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:12:26,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:26,648 INFO L225 Difference]: With dead ends: 60601 [2021-06-05 07:12:26,648 INFO L226 Difference]: Without dead ends: 60571 [2021-06-05 07:12:26,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 3443.8ms TimeCoverageRelationStatistics Valid=665, Invalid=3757, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 07:12:26,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60571 states. [2021-06-05 07:12:27,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60571 to 50303. [2021-06-05 07:12:27,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50303 states, 50302 states have (on average 3.8758697467297525) internal successors, (194964), 50302 states have internal predecessors, (194964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:27,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50303 states to 50303 states and 194964 transitions. [2021-06-05 07:12:27,995 INFO L78 Accepts]: Start accepts. Automaton has 50303 states and 194964 transitions. Word has length 30 [2021-06-05 07:12:27,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:27,996 INFO L482 AbstractCegarLoop]: Abstraction has 50303 states and 194964 transitions. [2021-06-05 07:12:27,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:27,996 INFO L276 IsEmpty]: Start isEmpty. Operand 50303 states and 194964 transitions. [2021-06-05 07:12:28,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:12:28,078 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:28,078 INFO L521 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] [2021-06-05 07:12:28,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2021-06-05 07:12:28,278 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:28,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:28,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1002714042, now seen corresponding path program 177 times [2021-06-05 07:12:28,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:28,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569571482] [2021-06-05 07:12:28,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:28,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:28,543 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:28,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:28,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569571482] [2021-06-05 07:12:28,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569571482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:28,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627016919] [2021-06-05 07:12:28,543 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 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:12:28,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:12:28,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:28,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 07:12:28,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:28,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:28,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:28,800 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:12:28,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 59 [2021-06-05 07:12:28,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:12:28,856 INFO L628 ElimStorePlain]: treesize reduction 73, result has 25.5 percent of original size [2021-06-05 07:12:28,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:12:28,858 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:37 [2021-06-05 07:12:28,914 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:28,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627016919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:28,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:28,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 07:12:28,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320043211] [2021-06-05 07:12:28,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:12:28,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:28,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:12:28,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:12:28,915 INFO L87 Difference]: Start difference. First operand 50303 states and 194964 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:30,588 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2021-06-05 07:12:30,829 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-06-05 07:12:31,494 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-06-05 07:12:31,817 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-06-05 07:12:32,017 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-06-05 07:12:32,245 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-06-05 07:12:32,597 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-06-05 07:12:34,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:34,171 INFO L93 Difference]: Finished difference Result 79320 states and 295712 transitions. [2021-06-05 07:12:34,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 07:12:34,171 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:12:34,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:34,386 INFO L225 Difference]: With dead ends: 79320 [2021-06-05 07:12:34,387 INFO L226 Difference]: Without dead ends: 79290 [2021-06-05 07:12:34,387 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1615 ImplicationChecksByTransitivity, 4216.4ms TimeCoverageRelationStatistics Valid=667, Invalid=5033, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 07:12:34,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79290 states. [2021-06-05 07:12:35,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79290 to 50315. [2021-06-05 07:12:35,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50315 states, 50314 states have (on average 3.8759391024366976) internal successors, (195014), 50314 states have internal predecessors, (195014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:35,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50315 states to 50315 states and 195014 transitions. [2021-06-05 07:12:35,856 INFO L78 Accepts]: Start accepts. Automaton has 50315 states and 195014 transitions. Word has length 30 [2021-06-05 07:12:35,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:35,856 INFO L482 AbstractCegarLoop]: Abstraction has 50315 states and 195014 transitions. [2021-06-05 07:12:35,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:35,857 INFO L276 IsEmpty]: Start isEmpty. Operand 50315 states and 195014 transitions. [2021-06-05 07:12:35,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:12:35,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:35,935 INFO L521 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] [2021-06-05 07:12:36,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable468,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:12:36,144 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:36,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:36,144 INFO L82 PathProgramCache]: Analyzing trace with hash 2016530042, now seen corresponding path program 178 times [2021-06-05 07:12:36,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:36,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049642238] [2021-06-05 07:12:36,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:36,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:36,343 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:36,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:36,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049642238] [2021-06-05 07:12:36,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049642238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:36,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783113498] [2021-06-05 07:12:36,343 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 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:12:36,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:12:36,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:36,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 07:12:36,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:36,637 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-06-05 07:12:36,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 53 [2021-06-05 07:12:36,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:12:36,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:12:36,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:12:36,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:84, output treesize:5 [2021-06-05 07:12:36,664 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:36,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783113498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:36,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:36,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 07:12:36,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357588021] [2021-06-05 07:12:36,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:12:36,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:36,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:12:36,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:12:36,665 INFO L87 Difference]: Start difference. First operand 50315 states and 195014 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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) [2021-06-05 07:12:37,792 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-06-05 07:12:39,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:39,581 INFO L93 Difference]: Finished difference Result 61699 states and 228811 transitions. [2021-06-05 07:12:39,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 07:12:39,581 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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 30 [2021-06-05 07:12:39,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:39,743 INFO L225 Difference]: With dead ends: 61699 [2021-06-05 07:12:39,743 INFO L226 Difference]: Without dead ends: 61624 [2021-06-05 07:12:39,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 2451.8ms TimeCoverageRelationStatistics Valid=551, Invalid=2419, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 07:12:39,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61624 states. [2021-06-05 07:12:40,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61624 to 50371. [2021-06-05 07:12:40,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50371 states, 50370 states have (on average 3.8753027595791147) internal successors, (195199), 50370 states have internal predecessors, (195199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:41,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50371 states to 50371 states and 195199 transitions. [2021-06-05 07:12:41,118 INFO L78 Accepts]: Start accepts. Automaton has 50371 states and 195199 transitions. Word has length 30 [2021-06-05 07:12:41,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:41,118 INFO L482 AbstractCegarLoop]: Abstraction has 50371 states and 195199 transitions. [2021-06-05 07:12:41,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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) [2021-06-05 07:12:41,118 INFO L276 IsEmpty]: Start isEmpty. Operand 50371 states and 195199 transitions. [2021-06-05 07:12:41,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:12:41,198 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:41,198 INFO L521 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] [2021-06-05 07:12:41,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-06-05 07:12:41,398 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:41,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:41,398 INFO L82 PathProgramCache]: Analyzing trace with hash -728055690, now seen corresponding path program 179 times [2021-06-05 07:12:41,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:41,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161938194] [2021-06-05 07:12:41,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:41,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:41,948 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:41,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:41,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161938194] [2021-06-05 07:12:41,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161938194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:41,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5182153] [2021-06-05 07:12:41,949 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 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:12:41,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:12:41,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:41,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 07:12:41,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:42,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:42,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:42,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:42,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:12:42,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:42,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:42,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:12:42,317 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 27 treesize of output 15 [2021-06-05 07:12:42,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:12:42,330 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.9 percent of original size [2021-06-05 07:12:42,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:12:42,332 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:46, output treesize:5 [2021-06-05 07:12:42,351 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:42,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5182153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:42,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:42,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 07:12:42,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535828915] [2021-06-05 07:12:42,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:12:42,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:42,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:12:42,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:12:42,352 INFO L87 Difference]: Start difference. First operand 50371 states and 195199 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:43,510 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2021-06-05 07:12:43,655 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-06-05 07:12:43,785 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-06-05 07:12:44,438 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2021-06-05 07:12:44,801 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2021-06-05 07:12:45,059 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-06-05 07:12:45,273 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2021-06-05 07:12:45,519 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2021-06-05 07:12:45,910 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-06-05 07:12:47,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:47,155 INFO L93 Difference]: Finished difference Result 71419 states and 267281 transitions. [2021-06-05 07:12:47,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 07:12:47,155 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:12:47,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:47,347 INFO L225 Difference]: With dead ends: 71419 [2021-06-05 07:12:47,347 INFO L226 Difference]: Without dead ends: 71404 [2021-06-05 07:12:47,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1218 ImplicationChecksByTransitivity, 3866.8ms TimeCoverageRelationStatistics Valid=568, Invalid=3854, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 07:12:47,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71404 states. [2021-06-05 07:12:48,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71404 to 50405. [2021-06-05 07:12:48,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50405 states, 50404 states have (on average 3.8749702404571065) internal successors, (195314), 50404 states have internal predecessors, (195314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:48,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50405 states to 50405 states and 195314 transitions. [2021-06-05 07:12:48,962 INFO L78 Accepts]: Start accepts. Automaton has 50405 states and 195314 transitions. Word has length 30 [2021-06-05 07:12:48,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:48,962 INFO L482 AbstractCegarLoop]: Abstraction has 50405 states and 195314 transitions. [2021-06-05 07:12:48,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:48,962 INFO L276 IsEmpty]: Start isEmpty. Operand 50405 states and 195314 transitions. [2021-06-05 07:12:49,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:12:49,047 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:49,047 INFO L521 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] [2021-06-05 07:12:49,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-06-05 07:12:49,248 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:49,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:49,248 INFO L82 PathProgramCache]: Analyzing trace with hash -610282946, now seen corresponding path program 180 times [2021-06-05 07:12:49,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:49,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588010722] [2021-06-05 07:12:49,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:49,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:49,681 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:49,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:49,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588010722] [2021-06-05 07:12:49,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588010722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:49,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903994670] [2021-06-05 07:12:49,681 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 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:12:49,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:12:49,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:49,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 07:12:49,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:49,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:49,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:49,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:12:49,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:49,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:49,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:12:49,963 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 29 treesize of output 15 [2021-06-05 07:12:49,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:12:49,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:12:49,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:12:49,969 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:5 [2021-06-05 07:12:49,990 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:49,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903994670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:49,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:49,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 07:12:49,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494308347] [2021-06-05 07:12:49,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:12:49,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:49,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:12:49,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:12:49,991 INFO L87 Difference]: Start difference. First operand 50405 states and 195314 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:52,783 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-06-05 07:12:53,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:53,155 INFO L93 Difference]: Finished difference Result 83242 states and 309514 transitions. [2021-06-05 07:12:53,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 07:12:53,156 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:12:53,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:53,377 INFO L225 Difference]: With dead ends: 83242 [2021-06-05 07:12:53,378 INFO L226 Difference]: Without dead ends: 83227 [2021-06-05 07:12:53,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 2420.0ms TimeCoverageRelationStatistics Valid=401, Invalid=3259, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 07:12:53,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83227 states. [2021-06-05 07:12:54,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83227 to 50447. [2021-06-05 07:12:54,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50447 states, 50446 states have (on average 3.874499464774214) internal successors, (195453), 50446 states have internal predecessors, (195453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:54,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50447 states to 50447 states and 195453 transitions. [2021-06-05 07:12:54,905 INFO L78 Accepts]: Start accepts. Automaton has 50447 states and 195453 transitions. Word has length 30 [2021-06-05 07:12:54,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:54,905 INFO L482 AbstractCegarLoop]: Abstraction has 50447 states and 195453 transitions. [2021-06-05 07:12:54,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:54,906 INFO L276 IsEmpty]: Start isEmpty. Operand 50447 states and 195453 transitions. [2021-06-05 07:12:54,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:12:54,990 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:54,990 INFO L521 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] [2021-06-05 07:12:55,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:12:55,191 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:55,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:55,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1538513590, now seen corresponding path program 181 times [2021-06-05 07:12:55,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:55,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510234573] [2021-06-05 07:12:55,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:55,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:55,387 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:55,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:55,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510234573] [2021-06-05 07:12:55,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510234573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:55,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424904622] [2021-06-05 07:12:55,387 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 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:12:55,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:55,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 07:12:55,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:55,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:55,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:55,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:12:55,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:12:55,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:12:55,691 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 29 treesize of output 15 [2021-06-05 07:12:55,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:12:55,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:12:55,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:12:55,697 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:5 [2021-06-05 07:12:55,718 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:55,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424904622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:55,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:55,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 07:12:55,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442464744] [2021-06-05 07:12:55,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:12:55,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:55,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:12:55,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:12:55,719 INFO L87 Difference]: Start difference. First operand 50447 states and 195453 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:58,955 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2021-06-05 07:12:59,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:59,683 INFO L93 Difference]: Finished difference Result 94065 states and 345973 transitions. [2021-06-05 07:12:59,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 07:12:59,684 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:12:59,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:59,918 INFO L225 Difference]: With dead ends: 94065 [2021-06-05 07:12:59,919 INFO L226 Difference]: Without dead ends: 94014 [2021-06-05 07:12:59,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 2654.2ms TimeCoverageRelationStatistics Valid=507, Invalid=3653, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 07:13:00,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94014 states. [2021-06-05 07:13:01,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94014 to 50456. [2021-06-05 07:13:01,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50456 states, 50455 states have (on average 3.8745813100782875) internal successors, (195492), 50455 states have internal predecessors, (195492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:01,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50456 states to 50456 states and 195492 transitions. [2021-06-05 07:13:01,516 INFO L78 Accepts]: Start accepts. Automaton has 50456 states and 195492 transitions. Word has length 30 [2021-06-05 07:13:01,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:01,516 INFO L482 AbstractCegarLoop]: Abstraction has 50456 states and 195492 transitions. [2021-06-05 07:13:01,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:01,516 INFO L276 IsEmpty]: Start isEmpty. Operand 50456 states and 195492 transitions. [2021-06-05 07:13:01,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:13:01,599 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:01,599 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:13:01,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:01,799 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:01,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:01,800 INFO L82 PathProgramCache]: Analyzing trace with hash -372848078, now seen corresponding path program 90 times [2021-06-05 07:13:01,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:01,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106733144] [2021-06-05 07:13:01,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:01,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:02,227 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:02,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:02,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106733144] [2021-06-05 07:13:02,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106733144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:02,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720399539] [2021-06-05 07:13:02,227 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 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:02,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:13:02,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:13:02,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 07:13:02,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:02,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:13:02,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:13:02,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:13:02,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:13:02,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:13:02,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:13:02,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:13:02,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:13:02,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:13:02,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-06-05 07:13:02,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:13:02,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:13:02,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:13:02,575 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:52, output treesize:12 [2021-06-05 07:13:02,592 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:02,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720399539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:02,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:02,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 07:13:02,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458370964] [2021-06-05 07:13:02,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:13:02,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:02,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:13:02,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:13:02,593 INFO L87 Difference]: Start difference. First operand 50456 states and 195492 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:03,553 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-06-05 07:13:03,986 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-06-05 07:13:04,154 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-06-05 07:13:04,546 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2021-06-05 07:13:05,165 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2021-06-05 07:13:05,378 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2021-06-05 07:13:05,784 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-06-05 07:13:07,106 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-06-05 07:13:07,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:07,778 INFO L93 Difference]: Finished difference Result 63848 states and 240271 transitions. [2021-06-05 07:13:07,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 07:13:07,778 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:13:07,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:07,953 INFO L225 Difference]: With dead ends: 63848 [2021-06-05 07:13:07,954 INFO L226 Difference]: Without dead ends: 63833 [2021-06-05 07:13:07,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 4215.8ms TimeCoverageRelationStatistics Valid=540, Invalid=3366, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 07:13:08,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63833 states. [2021-06-05 07:13:09,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63833 to 50491. [2021-06-05 07:13:09,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50491 states, 50490 states have (on average 3.873598732422262) internal successors, (195578), 50490 states have internal predecessors, (195578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:09,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50491 states to 50491 states and 195578 transitions. [2021-06-05 07:13:09,276 INFO L78 Accepts]: Start accepts. Automaton has 50491 states and 195578 transitions. Word has length 30 [2021-06-05 07:13:09,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:09,276 INFO L482 AbstractCegarLoop]: Abstraction has 50491 states and 195578 transitions. [2021-06-05 07:13:09,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:09,276 INFO L276 IsEmpty]: Start isEmpty. Operand 50491 states and 195578 transitions. [2021-06-05 07:13:09,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:13:09,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:09,360 INFO L521 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] [2021-06-05 07:13:09,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:09,560 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:09,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:09,561 INFO L82 PathProgramCache]: Analyzing trace with hash -792944066, now seen corresponding path program 182 times [2021-06-05 07:13:09,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:09,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127871340] [2021-06-05 07:13:09,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:09,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:09,758 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:09,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:09,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127871340] [2021-06-05 07:13:09,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127871340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:09,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080185041] [2021-06-05 07:13:09,759 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 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:09,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:13:09,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:13:09,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 07:13:09,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:10,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:13:10,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:13:10,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:13:10,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:13:10,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:13:10,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:13:10,050 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 29 treesize of output 15 [2021-06-05 07:13:10,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:13:10,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:13:10,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:13:10,056 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:5 [2021-06-05 07:13:10,076 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:10,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080185041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:10,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:10,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 07:13:10,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761054333] [2021-06-05 07:13:10,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:13:10,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:10,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:13:10,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:13:10,077 INFO L87 Difference]: Start difference. First operand 50491 states and 195578 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:11,402 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-06-05 07:13:13,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:13,511 INFO L93 Difference]: Finished difference Result 84008 states and 311824 transitions. [2021-06-05 07:13:13,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 07:13:13,511 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:13:13,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:13,741 INFO L225 Difference]: With dead ends: 84008 [2021-06-05 07:13:13,741 INFO L226 Difference]: Without dead ends: 83993 [2021-06-05 07:13:13,741 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 2332.5ms TimeCoverageRelationStatistics Valid=357, Invalid=2949, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 07:13:13,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83993 states. [2021-06-05 07:13:15,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83993 to 50558. [2021-06-05 07:13:15,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50558 states, 50557 states have (on average 3.873133295092668) internal successors, (195814), 50557 states have internal predecessors, (195814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:15,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50558 states to 50558 states and 195814 transitions. [2021-06-05 07:13:15,572 INFO L78 Accepts]: Start accepts. Automaton has 50558 states and 195814 transitions. Word has length 30 [2021-06-05 07:13:15,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:15,573 INFO L482 AbstractCegarLoop]: Abstraction has 50558 states and 195814 transitions. [2021-06-05 07:13:15,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:15,573 INFO L276 IsEmpty]: Start isEmpty. Operand 50558 states and 195814 transitions. [2021-06-05 07:13:15,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:13:15,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:15,657 INFO L521 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] [2021-06-05 07:13:15,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:15,858 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:15,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:15,858 INFO L82 PathProgramCache]: Analyzing trace with hash 956036336, now seen corresponding path program 183 times [2021-06-05 07:13:15,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:15,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576856506] [2021-06-05 07:13:15,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:15,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:16,036 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:16,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:16,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576856506] [2021-06-05 07:13:16,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576856506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:16,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225283510] [2021-06-05 07:13:16,036 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 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:16,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:13:16,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:13:16,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 07:13:16,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:16,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:13:16,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:13:16,502 INFO L354 Elim1Store]: treesize reduction 37, result has 49.3 percent of original size [2021-06-05 07:13:16,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 57 treesize of output 76 [2021-06-05 07:13:16,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:13:16,601 INFO L628 ElimStorePlain]: treesize reduction 25, result has 80.8 percent of original size [2021-06-05 07:13:16,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:13:16,607 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:75, output treesize:33 [2021-06-05 07:13:16,673 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:16,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225283510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:16,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:16,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 26 [2021-06-05 07:13:16,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363751213] [2021-06-05 07:13:16,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 07:13:16,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:16,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 07:13:16,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:13:16,674 INFO L87 Difference]: Start difference. First operand 50558 states and 195814 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:18,323 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-06-05 07:13:20,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:20,485 INFO L93 Difference]: Finished difference Result 83166 states and 309365 transitions. [2021-06-05 07:13:20,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 07:13:20,486 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:13:20,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:20,711 INFO L225 Difference]: With dead ends: 83166 [2021-06-05 07:13:20,711 INFO L226 Difference]: Without dead ends: 83136 [2021-06-05 07:13:20,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 2570.9ms TimeCoverageRelationStatistics Valid=345, Invalid=3195, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 07:13:20,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83136 states. [2021-06-05 07:13:22,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83136 to 50558. [2021-06-05 07:13:22,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50558 states, 50557 states have (on average 3.873133295092668) internal successors, (195814), 50557 states have internal predecessors, (195814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:22,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50558 states to 50558 states and 195814 transitions. [2021-06-05 07:13:22,509 INFO L78 Accepts]: Start accepts. Automaton has 50558 states and 195814 transitions. Word has length 30 [2021-06-05 07:13:22,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:22,509 INFO L482 AbstractCegarLoop]: Abstraction has 50558 states and 195814 transitions. [2021-06-05 07:13:22,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:22,509 INFO L276 IsEmpty]: Start isEmpty. Operand 50558 states and 195814 transitions. [2021-06-05 07:13:22,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:13:22,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:22,597 INFO L521 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] [2021-06-05 07:13:22,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:22,797 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:22,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:22,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1261273866, now seen corresponding path program 184 times [2021-06-05 07:13:22,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:22,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886099587] [2021-06-05 07:13:22,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:22,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:23,048 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:23,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:23,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886099587] [2021-06-05 07:13:23,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886099587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:23,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128969971] [2021-06-05 07:13:23,048 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 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:23,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:13:23,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:13:23,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 07:13:23,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:23,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:13:23,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:13:23,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:13:23,393 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 27 treesize of output 15 [2021-06-05 07:13:23,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:13:23,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:13:23,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:13:23,400 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:5 [2021-06-05 07:13:23,414 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:23,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128969971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:23,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:23,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 07:13:23,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452305698] [2021-06-05 07:13:23,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:13:23,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:23,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:13:23,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:13:23,415 INFO L87 Difference]: Start difference. First operand 50558 states and 195814 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:25,470 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-06-05 07:13:26,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:26,073 INFO L93 Difference]: Finished difference Result 69018 states and 261530 transitions. [2021-06-05 07:13:26,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:13:26,074 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:13:26,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:26,273 INFO L225 Difference]: With dead ends: 69018 [2021-06-05 07:13:26,273 INFO L226 Difference]: Without dead ends: 68952 [2021-06-05 07:13:26,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 2114.1ms TimeCoverageRelationStatistics Valid=521, Invalid=2131, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 07:13:26,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68952 states. [2021-06-05 07:13:27,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68952 to 50665. [2021-06-05 07:13:27,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50665 states, 50664 states have (on average 3.873263066477183) internal successors, (196235), 50664 states have internal predecessors, (196235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:27,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50665 states to 50665 states and 196235 transitions. [2021-06-05 07:13:27,761 INFO L78 Accepts]: Start accepts. Automaton has 50665 states and 196235 transitions. Word has length 30 [2021-06-05 07:13:27,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:27,761 INFO L482 AbstractCegarLoop]: Abstraction has 50665 states and 196235 transitions. [2021-06-05 07:13:27,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:27,761 INFO L276 IsEmpty]: Start isEmpty. Operand 50665 states and 196235 transitions. [2021-06-05 07:13:27,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:13:27,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:27,846 INFO L521 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] [2021-06-05 07:13:28,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2021-06-05 07:13:28,046 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:28,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:28,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1005295414, now seen corresponding path program 185 times [2021-06-05 07:13:28,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:28,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632068858] [2021-06-05 07:13:28,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:28,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:28,252 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:28,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:28,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632068858] [2021-06-05 07:13:28,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632068858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:28,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443091901] [2021-06-05 07:13:28,252 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 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:28,276 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:13:28,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:13:28,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 07:13:28,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:28,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:13:28,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:13:28,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:13:28,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 07:13:28,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:13:28,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:13:28,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:13:28,547 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:5 [2021-06-05 07:13:28,567 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:28,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443091901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:28,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:28,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 07:13:28,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067627763] [2021-06-05 07:13:28,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:13:28,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:28,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:13:28,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:13:28,568 INFO L87 Difference]: Start difference. First operand 50665 states and 196235 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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) [2021-06-05 07:13:29,212 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-06-05 07:13:31,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:31,014 INFO L93 Difference]: Finished difference Result 68874 states and 261214 transitions. [2021-06-05 07:13:31,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 07:13:31,014 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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 30 [2021-06-05 07:13:31,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:31,203 INFO L225 Difference]: With dead ends: 68874 [2021-06-05 07:13:31,203 INFO L226 Difference]: Without dead ends: 68826 [2021-06-05 07:13:31,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1810.1ms TimeCoverageRelationStatistics Valid=498, Invalid=2052, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:13:31,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68826 states. [2021-06-05 07:13:32,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68826 to 50649. [2021-06-05 07:13:32,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50649 states, 50648 states have (on average 3.8736574000947717) internal successors, (196193), 50648 states have internal predecessors, (196193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:32,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50649 states to 50649 states and 196193 transitions. [2021-06-05 07:13:32,626 INFO L78 Accepts]: Start accepts. Automaton has 50649 states and 196193 transitions. Word has length 30 [2021-06-05 07:13:32,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:32,626 INFO L482 AbstractCegarLoop]: Abstraction has 50649 states and 196193 transitions. [2021-06-05 07:13:32,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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) [2021-06-05 07:13:32,626 INFO L276 IsEmpty]: Start isEmpty. Operand 50649 states and 196193 transitions. [2021-06-05 07:13:32,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:13:32,996 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:32,997 INFO L521 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] [2021-06-05 07:13:33,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-06-05 07:13:33,213 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:33,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:33,213 INFO L82 PathProgramCache]: Analyzing trace with hash -893195398, now seen corresponding path program 186 times [2021-06-05 07:13:33,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:33,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125475294] [2021-06-05 07:13:33,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:33,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:33,407 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:33,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:33,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125475294] [2021-06-05 07:13:33,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125475294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:33,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79636557] [2021-06-05 07:13:33,407 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 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:33,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:13:33,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:13:33,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 07:13:33,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:33,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:13:33,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:13:33,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:13:33,691 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 27 treesize of output 15 [2021-06-05 07:13:33,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:13:33,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:13:33,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:13:33,697 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:5 [2021-06-05 07:13:33,714 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:33,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79636557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:33,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:33,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 07:13:33,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259391096] [2021-06-05 07:13:33,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:13:33,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:33,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:13:33,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:13:33,715 INFO L87 Difference]: Start difference. First operand 50649 states and 196193 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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) [2021-06-05 07:13:36,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:36,567 INFO L93 Difference]: Finished difference Result 72235 states and 271440 transitions. [2021-06-05 07:13:36,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 07:13:36,568 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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 30 [2021-06-05 07:13:36,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:36,757 INFO L225 Difference]: With dead ends: 72235 [2021-06-05 07:13:36,758 INFO L226 Difference]: Without dead ends: 72163 [2021-06-05 07:13:36,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 1908.7ms TimeCoverageRelationStatistics Valid=695, Invalid=2727, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 07:13:36,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72163 states. [2021-06-05 07:13:38,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72163 to 50684. [2021-06-05 07:13:38,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50684 states, 50683 states have (on average 3.8730738117317443) internal successors, (196299), 50683 states have internal predecessors, (196299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:38,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50684 states to 50684 states and 196299 transitions. [2021-06-05 07:13:38,229 INFO L78 Accepts]: Start accepts. Automaton has 50684 states and 196299 transitions. Word has length 30 [2021-06-05 07:13:38,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:38,230 INFO L482 AbstractCegarLoop]: Abstraction has 50684 states and 196299 transitions. [2021-06-05 07:13:38,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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) [2021-06-05 07:13:38,230 INFO L276 IsEmpty]: Start isEmpty. Operand 50684 states and 196299 transitions. [2021-06-05 07:13:38,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:13:38,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:38,317 INFO L521 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] [2021-06-05 07:13:38,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:38,518 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:38,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:38,518 INFO L82 PathProgramCache]: Analyzing trace with hash -319132678, now seen corresponding path program 187 times [2021-06-05 07:13:38,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:38,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845445480] [2021-06-05 07:13:38,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:38,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:38,708 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:38,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:38,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845445480] [2021-06-05 07:13:38,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845445480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:38,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214494] [2021-06-05 07:13:38,708 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 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:38,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:38,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 07:13:38,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:39,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:13:39,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:13:39,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:13:39,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:13:39,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:13:39,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:13:39,044 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 27 treesize of output 15 [2021-06-05 07:13:39,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:13:39,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:13:39,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:13:39,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:15 [2021-06-05 07:13:39,097 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:39,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:39,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:39,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 07:13:39,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942059083] [2021-06-05 07:13:39,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:13:39,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:39,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:13:39,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:13:39,098 INFO L87 Difference]: Start difference. First operand 50684 states and 196299 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:44,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:44,247 INFO L93 Difference]: Finished difference Result 91851 states and 339846 transitions. [2021-06-05 07:13:44,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 07:13:44,248 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:13:44,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:44,489 INFO L225 Difference]: With dead ends: 91851 [2021-06-05 07:13:44,489 INFO L226 Difference]: Without dead ends: 91815 [2021-06-05 07:13:44,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1800 ImplicationChecksByTransitivity, 3678.7ms TimeCoverageRelationStatistics Valid=631, Invalid=5221, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 07:13:44,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91815 states. [2021-06-05 07:13:45,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91815 to 50856. [2021-06-05 07:13:45,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50856 states, 50855 states have (on average 3.8713007570543705) internal successors, (196875), 50855 states have internal predecessors, (196875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:46,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50856 states to 50856 states and 196875 transitions. [2021-06-05 07:13:46,108 INFO L78 Accepts]: Start accepts. Automaton has 50856 states and 196875 transitions. Word has length 30 [2021-06-05 07:13:46,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:46,108 INFO L482 AbstractCegarLoop]: Abstraction has 50856 states and 196875 transitions. [2021-06-05 07:13:46,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:46,108 INFO L276 IsEmpty]: Start isEmpty. Operand 50856 states and 196875 transitions. [2021-06-05 07:13:46,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:13:46,191 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:46,191 INFO L521 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] [2021-06-05 07:13:46,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable491 [2021-06-05 07:13:46,391 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:46,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:46,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1890767390, now seen corresponding path program 188 times [2021-06-05 07:13:46,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:46,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733312788] [2021-06-05 07:13:46,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:46,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:46,585 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:46,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:46,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733312788] [2021-06-05 07:13:46,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733312788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:46,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795213347] [2021-06-05 07:13:46,586 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 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:46,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:13:46,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:13:46,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 07:13:46,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:47,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:13:47,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:13:47,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:13:47,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 39 [2021-06-05 07:13:47,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:13:47,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:13:47,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 07:13:47,306 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:23 [2021-06-05 07:13:47,357 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:47,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795213347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:47,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:47,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2021-06-05 07:13:47,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471801654] [2021-06-05 07:13:47,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:13:47,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:47,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:13:47,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:13:47,358 INFO L87 Difference]: Start difference. First operand 50856 states and 196875 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:50,788 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-06-05 07:13:52,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:52,392 INFO L93 Difference]: Finished difference Result 71154 states and 268043 transitions. [2021-06-05 07:13:52,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 07:13:52,392 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:13:52,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:52,589 INFO L225 Difference]: With dead ends: 71154 [2021-06-05 07:13:52,589 INFO L226 Difference]: Without dead ends: 71103 [2021-06-05 07:13:52,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1614 ImplicationChecksByTransitivity, 3972.6ms TimeCoverageRelationStatistics Valid=839, Invalid=4563, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 07:13:52,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71103 states. [2021-06-05 07:13:53,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71103 to 50856. [2021-06-05 07:13:53,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50856 states, 50855 states have (on average 3.8713007570543705) internal successors, (196875), 50855 states have internal predecessors, (196875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:53,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50856 states to 50856 states and 196875 transitions. [2021-06-05 07:13:53,982 INFO L78 Accepts]: Start accepts. Automaton has 50856 states and 196875 transitions. Word has length 30 [2021-06-05 07:13:53,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:53,982 INFO L482 AbstractCegarLoop]: Abstraction has 50856 states and 196875 transitions. [2021-06-05 07:13:53,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:53,983 INFO L276 IsEmpty]: Start isEmpty. Operand 50856 states and 196875 transitions. [2021-06-05 07:13:54,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:13:54,070 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:54,070 INFO L521 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] [2021-06-05 07:13:54,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:54,270 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:54,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:54,271 INFO L82 PathProgramCache]: Analyzing trace with hash -137630626, now seen corresponding path program 189 times [2021-06-05 07:13:54,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:54,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850171103] [2021-06-05 07:13:54,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:54,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:54,461 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:54,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:54,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850171103] [2021-06-05 07:13:54,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850171103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:54,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822379593] [2021-06-05 07:13:54,461 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 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:54,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:13:54,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:13:54,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 07:13:54,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:54,833 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-06-05 07:13:54,993 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:13:54,993 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 27 treesize of output 55 [2021-06-05 07:13:54,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:13:55,035 INFO L628 ElimStorePlain]: treesize reduction 53, result has 45.9 percent of original size [2021-06-05 07:13:55,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 07:13:55,048 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:103 [2021-06-05 07:13:55,125 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:55,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822379593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:55,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:55,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 07:13:55,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548900970] [2021-06-05 07:13:55,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:13:55,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:55,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:13:55,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:13:55,126 INFO L87 Difference]: Start difference. First operand 50856 states and 196875 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:59,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:59,125 INFO L93 Difference]: Finished difference Result 71044 states and 267781 transitions. [2021-06-05 07:13:59,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 07:13:59,125 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:13:59,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:59,334 INFO L225 Difference]: With dead ends: 71044 [2021-06-05 07:13:59,334 INFO L226 Difference]: Without dead ends: 70990 [2021-06-05 07:13:59,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1421 ImplicationChecksByTransitivity, 3311.6ms TimeCoverageRelationStatistics Valid=670, Invalid=3886, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 07:13:59,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70990 states. [2021-06-05 07:14:00,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70990 to 50820. [2021-06-05 07:14:00,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50820 states, 50819 states have (on average 3.8718195950333536) internal successors, (196762), 50819 states have internal predecessors, (196762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:14:00,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50820 states to 50820 states and 196762 transitions. [2021-06-05 07:14:00,731 INFO L78 Accepts]: Start accepts. Automaton has 50820 states and 196762 transitions. Word has length 30 [2021-06-05 07:14:00,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:14:00,731 INFO L482 AbstractCegarLoop]: Abstraction has 50820 states and 196762 transitions. [2021-06-05 07:14:00,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:14:00,732 INFO L276 IsEmpty]: Start isEmpty. Operand 50820 states and 196762 transitions. [2021-06-05 07:14:00,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:14:00,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:14:00,812 INFO L521 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] [2021-06-05 07:14:01,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable496,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:14:01,013 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:14:01,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:14:01,013 INFO L82 PathProgramCache]: Analyzing trace with hash -2075040334, now seen corresponding path program 190 times [2021-06-05 07:14:01,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:14:01,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370732773] [2021-06-05 07:14:01,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:14:01,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:14:01,169 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:01,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:14:01,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370732773] [2021-06-05 07:14:01,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370732773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:01,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589681954] [2021-06-05 07:14:01,170 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 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:14:01,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:14:01,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:14:01,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 07:14:01,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:14:01,498 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-06-05 07:14:01,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 53 [2021-06-05 07:14:01,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:14:01,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:14:01,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:14:01,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:84, output treesize:5 [2021-06-05 07:14:01,520 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:01,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589681954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:01,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:14:01,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 07:14:01,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069805431] [2021-06-05 07:14:01,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:14:01,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:14:01,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:14:01,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:14:01,521 INFO L87 Difference]: Start difference. First operand 50820 states and 196762 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:14:04,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:14:04,816 INFO L93 Difference]: Finished difference Result 76562 states and 289629 transitions. [2021-06-05 07:14:04,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 07:14:04,817 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:14:04,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:14:05,291 INFO L225 Difference]: With dead ends: 76562 [2021-06-05 07:14:05,291 INFO L226 Difference]: Without dead ends: 76526 [2021-06-05 07:14:05,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1142 ImplicationChecksByTransitivity, 2388.6ms TimeCoverageRelationStatistics Valid=647, Invalid=2893, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 07:14:05,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76526 states. [2021-06-05 07:14:06,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76526 to 50849. [2021-06-05 07:14:06,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50849 states, 50848 states have (on average 3.8721286972938955) internal successors, (196890), 50848 states have internal predecessors, (196890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:14:06,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50849 states to 50849 states and 196890 transitions. [2021-06-05 07:14:06,712 INFO L78 Accepts]: Start accepts. Automaton has 50849 states and 196890 transitions. Word has length 30 [2021-06-05 07:14:06,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:14:06,712 INFO L482 AbstractCegarLoop]: Abstraction has 50849 states and 196890 transitions. [2021-06-05 07:14:06,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:14:06,713 INFO L276 IsEmpty]: Start isEmpty. Operand 50849 states and 196890 transitions. [2021-06-05 07:14:06,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:14:06,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:14:06,798 INFO L521 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] [2021-06-05 07:14:06,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:14:06,999 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:14:06,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:14:06,999 INFO L82 PathProgramCache]: Analyzing trace with hash 2052117870, now seen corresponding path program 191 times [2021-06-05 07:14:06,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:14:06,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288693386] [2021-06-05 07:14:06,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:14:07,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:14:07,157 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:07,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:14:07,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288693386] [2021-06-05 07:14:07,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288693386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:07,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139328158] [2021-06-05 07:14:07,157 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 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:14:07,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:14:07,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:14:07,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 07:14:07,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:14:07,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:14:07,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:14:07,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:14:07,401 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 27 treesize of output 15 [2021-06-05 07:14:07,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:14:07,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:14:07,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:14:07,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:5 [2021-06-05 07:14:07,427 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:07,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139328158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:07,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:14:07,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 07:14:07,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744945643] [2021-06-05 07:14:07,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:14:07,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:14:07,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:14:07,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:14:07,428 INFO L87 Difference]: Start difference. First operand 50849 states and 196890 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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) [2021-06-05 07:14:08,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:14:08,961 INFO L93 Difference]: Finished difference Result 60558 states and 229990 transitions. [2021-06-05 07:14:08,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:14:08,972 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 30 [2021-06-05 07:14:08,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:14:09,144 INFO L225 Difference]: With dead ends: 60558 [2021-06-05 07:14:09,144 INFO L226 Difference]: Without dead ends: 60543 [2021-06-05 07:14:09,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 841.4ms TimeCoverageRelationStatistics Valid=157, Invalid=1033, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:14:09,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60543 states. [2021-06-05 07:14:10,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60543 to 50841. [2021-06-05 07:14:10,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50841 states, 50840 states have (on average 3.8721872541306057) internal successors, (196862), 50840 states have internal predecessors, (196862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:14:10,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50841 states to 50841 states and 196862 transitions. [2021-06-05 07:14:10,519 INFO L78 Accepts]: Start accepts. Automaton has 50841 states and 196862 transitions. Word has length 30 [2021-06-05 07:14:10,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:14:10,520 INFO L482 AbstractCegarLoop]: Abstraction has 50841 states and 196862 transitions. [2021-06-05 07:14:10,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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) [2021-06-05 07:14:10,520 INFO L276 IsEmpty]: Start isEmpty. Operand 50841 states and 196862 transitions. [2021-06-05 07:14:10,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:14:10,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:14:10,601 INFO L521 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] [2021-06-05 07:14:10,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:14:10,801 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:14:10,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:14:10,802 INFO L82 PathProgramCache]: Analyzing trace with hash -15398158, now seen corresponding path program 192 times [2021-06-05 07:14:10,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:14:10,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452742844] [2021-06-05 07:14:10,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:14:10,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:14:10,988 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:10,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:14:10,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452742844] [2021-06-05 07:14:10,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452742844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:10,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286097658] [2021-06-05 07:14:10,989 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 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:14:11,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:14:11,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:14:11,027 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 07:14:11,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:14:11,386 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:14:11,386 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 5 new quantified variables, introduced 7 case distinctions, treesize of input 27 treesize of output 71 [2021-06-05 07:14:11,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:14:11,536 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 55 [2021-06-05 07:14:11,537 INFO L628 ElimStorePlain]: treesize reduction 217, result has 29.5 percent of original size [2021-06-05 07:14:11,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:14:11,551 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:54, output treesize:200 [2021-06-05 07:14:11,695 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2021-06-05 07:14:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:11,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286097658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:11,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:14:11,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 25 [2021-06-05 07:14:11,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134283121] [2021-06-05 07:14:11,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:14:11,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:14:11,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:14:11,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:14:11,831 INFO L87 Difference]: Start difference. First operand 50841 states and 196862 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:14:13,087 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-05 07:14:14,819 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 59 [2021-06-05 07:14:15,306 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2021-06-05 07:14:18,146 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-06-05 07:14:18,480 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-06-05 07:14:18,610 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-06-05 07:14:18,797 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-06-05 07:14:19,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:14:19,257 INFO L93 Difference]: Finished difference Result 81005 states and 305937 transitions. [2021-06-05 07:14:19,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 07:14:19,258 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:14:19,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:14:19,508 INFO L225 Difference]: With dead ends: 81005 [2021-06-05 07:14:19,508 INFO L226 Difference]: Without dead ends: 80960 [2021-06-05 07:14:19,509 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3094 ImplicationChecksByTransitivity, 6188.3ms TimeCoverageRelationStatistics Valid=1313, Invalid=7807, Unknown=0, NotChecked=0, Total=9120 [2021-06-05 07:14:19,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80960 states. [2021-06-05 07:14:20,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80960 to 50848. [2021-06-05 07:14:21,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50848 states, 50847 states have (on average 3.8721851829999805) internal successors, (196889), 50847 states have internal predecessors, (196889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:14:21,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50848 states to 50848 states and 196889 transitions. [2021-06-05 07:14:21,175 INFO L78 Accepts]: Start accepts. Automaton has 50848 states and 196889 transitions. Word has length 30 [2021-06-05 07:14:21,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:14:21,175 INFO L482 AbstractCegarLoop]: Abstraction has 50848 states and 196889 transitions. [2021-06-05 07:14:21,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:14:21,176 INFO L276 IsEmpty]: Start isEmpty. Operand 50848 states and 196889 transitions. [2021-06-05 07:14:21,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:14:21,263 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:14:21,263 INFO L521 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] [2021-06-05 07:14:21,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable507 [2021-06-05 07:14:21,463 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:14:21,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:14:21,464 INFO L82 PathProgramCache]: Analyzing trace with hash -512119518, now seen corresponding path program 193 times [2021-06-05 07:14:21,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:14:21,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882992538] [2021-06-05 07:14:21,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:14:21,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:14:21,655 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:21,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:14:21,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882992538] [2021-06-05 07:14:21,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882992538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:21,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470241285] [2021-06-05 07:14:21,655 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 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:14:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:14:21,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 07:14:21,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:14:21,967 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-06-05 07:14:21,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 53 [2021-06-05 07:14:21,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:14:21,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:14:21,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:14:21,975 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:84, output treesize:5 [2021-06-05 07:14:21,992 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:21,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470241285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:21,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:14:21,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 07:14:21,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720666565] [2021-06-05 07:14:21,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:14:21,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:14:21,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:14:21,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:14:21,993 INFO L87 Difference]: Start difference. First operand 50848 states and 196889 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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) [2021-06-05 07:14:24,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:14:24,922 INFO L93 Difference]: Finished difference Result 77700 states and 291511 transitions. [2021-06-05 07:14:24,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 07:14:24,922 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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 30 [2021-06-05 07:14:24,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:14:25,144 INFO L225 Difference]: With dead ends: 77700 [2021-06-05 07:14:25,144 INFO L226 Difference]: Without dead ends: 77655 [2021-06-05 07:14:25,145 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1185 ImplicationChecksByTransitivity, 1923.3ms TimeCoverageRelationStatistics Valid=677, Invalid=2745, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 07:14:25,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77655 states. [2021-06-05 07:14:26,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77655 to 50905. [2021-06-05 07:14:26,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50905 states, 50904 states have (on average 3.873035517837498) internal successors, (197153), 50904 states have internal predecessors, (197153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:14:26,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50905 states to 50905 states and 197153 transitions. [2021-06-05 07:14:26,709 INFO L78 Accepts]: Start accepts. Automaton has 50905 states and 197153 transitions. Word has length 30 [2021-06-05 07:14:26,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:14:26,709 INFO L482 AbstractCegarLoop]: Abstraction has 50905 states and 197153 transitions. [2021-06-05 07:14:26,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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) [2021-06-05 07:14:26,709 INFO L276 IsEmpty]: Start isEmpty. Operand 50905 states and 197153 transitions. [2021-06-05 07:14:26,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:14:26,792 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:14:26,792 INFO L521 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] [2021-06-05 07:14:26,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable534,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:14:26,992 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:14:26,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:14:26,993 INFO L82 PathProgramCache]: Analyzing trace with hash -2129652298, now seen corresponding path program 194 times [2021-06-05 07:14:26,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:14:26,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327983880] [2021-06-05 07:14:26,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:14:26,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:14:27,471 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:27,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:14:27,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327983880] [2021-06-05 07:14:27,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327983880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:27,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065333882] [2021-06-05 07:14:27,472 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 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:14:27,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:14:27,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:14:27,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 07:14:27,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:14:27,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:14:27,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:14:27,745 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:14:27,745 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 27 treesize of output 39 [2021-06-05 07:14:27,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:14:27,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:14:27,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 07:14:27,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:23 [2021-06-05 07:14:27,828 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:27,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065333882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:27,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:14:27,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 07:14:27,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755250311] [2021-06-05 07:14:27,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:14:27,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:14:27,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:14:27,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:14:27,828 INFO L87 Difference]: Start difference. First operand 50905 states and 197153 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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) [2021-06-05 07:14:31,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:14:31,761 INFO L93 Difference]: Finished difference Result 83144 states and 313968 transitions. [2021-06-05 07:14:31,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 07:14:31,762 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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 30 [2021-06-05 07:14:31,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:14:31,986 INFO L225 Difference]: With dead ends: 83144 [2021-06-05 07:14:31,986 INFO L226 Difference]: Without dead ends: 83114 [2021-06-05 07:14:31,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2033 ImplicationChecksByTransitivity, 2804.6ms TimeCoverageRelationStatistics Valid=1067, Invalid=4633, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 07:14:32,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83114 states. [2021-06-05 07:14:33,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83114 to 50927. [2021-06-05 07:14:33,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50927 states, 50926 states have (on average 3.873443820445352) internal successors, (197259), 50926 states have internal predecessors, (197259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:14:33,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50927 states to 50927 states and 197259 transitions. [2021-06-05 07:14:33,559 INFO L78 Accepts]: Start accepts. Automaton has 50927 states and 197259 transitions. Word has length 30 [2021-06-05 07:14:33,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:14:33,560 INFO L482 AbstractCegarLoop]: Abstraction has 50927 states and 197259 transitions. [2021-06-05 07:14:33,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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) [2021-06-05 07:14:33,560 INFO L276 IsEmpty]: Start isEmpty. Operand 50927 states and 197259 transitions. [2021-06-05 07:14:33,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:14:33,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:14:33,644 INFO L521 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] [2021-06-05 07:14:33,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable535 [2021-06-05 07:14:33,844 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:14:33,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:14:33,845 INFO L82 PathProgramCache]: Analyzing trace with hash 382550838, now seen corresponding path program 195 times [2021-06-05 07:14:33,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:14:33,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744507153] [2021-06-05 07:14:33,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:14:33,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:14:34,102 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:34,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:14:34,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744507153] [2021-06-05 07:14:34,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744507153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:34,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861407877] [2021-06-05 07:14:34,103 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 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:14:34,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:14:34,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:14:34,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 07:14:34,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:14:34,397 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-06-05 07:14:34,626 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:14:34,626 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 27 treesize of output 55 [2021-06-05 07:14:34,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:14:34,668 INFO L628 ElimStorePlain]: treesize reduction 51, result has 46.9 percent of original size [2021-06-05 07:14:34,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 07:14:34,681 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:83 [2021-06-05 07:14:34,755 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:34,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861407877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:34,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:14:34,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 07:14:34,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49285285] [2021-06-05 07:14:34,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:14:34,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:14:34,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:14:34,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:14:34,756 INFO L87 Difference]: Start difference. First operand 50927 states and 197259 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:14:35,254 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-06-05 07:14:37,375 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-06-05 07:14:37,787 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-06-05 07:14:38,023 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2021-06-05 07:14:38,507 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2021-06-05 07:14:39,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:14:39,335 INFO L93 Difference]: Finished difference Result 74529 states and 282265 transitions. [2021-06-05 07:14:39,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 07:14:39,335 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:14:39,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:14:39,539 INFO L225 Difference]: With dead ends: 74529 [2021-06-05 07:14:39,540 INFO L226 Difference]: Without dead ends: 74499 [2021-06-05 07:14:39,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1615 ImplicationChecksByTransitivity, 3718.7ms TimeCoverageRelationStatistics Valid=826, Invalid=4144, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 07:14:39,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74499 states. [2021-06-05 07:14:40,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74499 to 50939. [2021-06-05 07:14:40,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50939 states, 50938 states have (on average 3.8735717931603126) internal successors, (197312), 50938 states have internal predecessors, (197312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:14:40,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50939 states to 50939 states and 197312 transitions. [2021-06-05 07:14:40,956 INFO L78 Accepts]: Start accepts. Automaton has 50939 states and 197312 transitions. Word has length 30 [2021-06-05 07:14:40,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:14:40,956 INFO L482 AbstractCegarLoop]: Abstraction has 50939 states and 197312 transitions. [2021-06-05 07:14:40,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:14:40,956 INFO L276 IsEmpty]: Start isEmpty. Operand 50939 states and 197312 transitions. [2021-06-05 07:14:41,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:14:41,042 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:14:41,042 INFO L521 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] [2021-06-05 07:14:41,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable539 [2021-06-05 07:14:41,242 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:14:41,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:14:41,243 INFO L82 PathProgramCache]: Analyzing trace with hash 956613558, now seen corresponding path program 196 times [2021-06-05 07:14:41,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:14:41,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986609916] [2021-06-05 07:14:41,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:14:41,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:14:41,420 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:41,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:14:41,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986609916] [2021-06-05 07:14:41,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986609916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:41,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729942181] [2021-06-05 07:14:41,420 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 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:14:41,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:14:41,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:14:41,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 07:14:41,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:14:41,764 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2021-06-05 07:14:41,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:14:41,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:14:41,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:14:41,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:14:41,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:14:41,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:14:41,988 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 41 treesize of output 25 [2021-06-05 07:14:41,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:14:41,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:14:41,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:14:41,997 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:64, output treesize:22 [2021-06-05 07:14:42,040 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:42,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729942181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:42,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:14:42,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 07:14:42,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527231806] [2021-06-05 07:14:42,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:14:42,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:14:42,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:14:42,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:14:42,041 INFO L87 Difference]: Start difference. First operand 50939 states and 197312 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:14:48,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:14:48,740 INFO L93 Difference]: Finished difference Result 97250 states and 359275 transitions. [2021-06-05 07:14:48,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 07:14:48,741 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:14:48,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:14:48,992 INFO L225 Difference]: With dead ends: 97250 [2021-06-05 07:14:48,992 INFO L226 Difference]: Without dead ends: 97199 [2021-06-05 07:14:48,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2871 ImplicationChecksByTransitivity, 4673.5ms TimeCoverageRelationStatistics Valid=1104, Invalid=7452, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 07:14:49,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97199 states. [2021-06-05 07:14:50,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97199 to 51032. [2021-06-05 07:14:50,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51032 states, 51031 states have (on average 3.874292096960671) internal successors, (197709), 51031 states have internal predecessors, (197709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:14:50,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51032 states to 51032 states and 197709 transitions. [2021-06-05 07:14:50,675 INFO L78 Accepts]: Start accepts. Automaton has 51032 states and 197709 transitions. Word has length 30 [2021-06-05 07:14:50,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:14:50,675 INFO L482 AbstractCegarLoop]: Abstraction has 51032 states and 197709 transitions. [2021-06-05 07:14:50,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:14:50,675 INFO L276 IsEmpty]: Start isEmpty. Operand 51032 states and 197709 transitions. [2021-06-05 07:14:50,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:14:50,761 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:14:50,761 INFO L521 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] [2021-06-05 07:14:50,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:14:50,961 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:14:50,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:14:50,962 INFO L82 PathProgramCache]: Analyzing trace with hash 354888434, now seen corresponding path program 197 times [2021-06-05 07:14:50,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:14:50,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049328114] [2021-06-05 07:14:50,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:14:50,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:14:51,126 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:51,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:14:51,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049328114] [2021-06-05 07:14:51,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049328114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:51,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486241454] [2021-06-05 07:14:51,127 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 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:14:51,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:14:51,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:14:51,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 07:14:51,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:14:51,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:14:51,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:14:51,387 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:14:51,387 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 39 [2021-06-05 07:14:51,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:14:51,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:14:51,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 07:14:51,402 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:23 [2021-06-05 07:14:51,446 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:51,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486241454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:51,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:14:51,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 07:14:51,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866782630] [2021-06-05 07:14:51,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:14:51,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:14:51,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:14:51,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:14:51,447 INFO L87 Difference]: Start difference. First operand 51032 states and 197709 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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) [2021-06-05 07:14:55,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:14:55,426 INFO L93 Difference]: Finished difference Result 84956 states and 320071 transitions. [2021-06-05 07:14:55,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 07:14:55,427 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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 30 [2021-06-05 07:14:55,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:14:55,643 INFO L225 Difference]: With dead ends: 84956 [2021-06-05 07:14:55,643 INFO L226 Difference]: Without dead ends: 84926 [2021-06-05 07:14:55,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1879 ImplicationChecksByTransitivity, 2479.0ms TimeCoverageRelationStatistics Valid=1060, Invalid=4052, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 07:14:55,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84926 states. [2021-06-05 07:14:56,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84926 to 51051. [2021-06-05 07:14:56,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51051 states, 51050 states have (on average 3.874828599412341) internal successors, (197810), 51050 states have internal predecessors, (197810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:14:57,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51051 states to 51051 states and 197810 transitions. [2021-06-05 07:14:57,156 INFO L78 Accepts]: Start accepts. Automaton has 51051 states and 197810 transitions. Word has length 30 [2021-06-05 07:14:57,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:14:57,156 INFO L482 AbstractCegarLoop]: Abstraction has 51051 states and 197810 transitions. [2021-06-05 07:14:57,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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) [2021-06-05 07:14:57,156 INFO L276 IsEmpty]: Start isEmpty. Operand 51051 states and 197810 transitions. [2021-06-05 07:14:57,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:14:57,240 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:14:57,240 INFO L521 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] [2021-06-05 07:14:57,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:14:57,440 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:14:57,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:14:57,441 INFO L82 PathProgramCache]: Analyzing trace with hash 375624962, now seen corresponding path program 198 times [2021-06-05 07:14:57,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:14:57,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934985428] [2021-06-05 07:14:57,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:14:57,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:14:57,671 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:57,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:14:57,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934985428] [2021-06-05 07:14:57,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934985428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:57,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582470706] [2021-06-05 07:14:57,671 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 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:14:57,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:14:57,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:14:57,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 07:14:57,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:14:57,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:14:57,996 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:14:57,996 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 4 case distinctions, treesize of input 27 treesize of output 31 [2021-06-05 07:14:57,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:14:58,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:14:58,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:14:58,003 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-06-05 07:14:58,018 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:58,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582470706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:58,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:14:58,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 07:14:58,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506175129] [2021-06-05 07:14:58,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:14:58,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:14:58,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:14:58,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:14:58,019 INFO L87 Difference]: Start difference. First operand 51051 states and 197810 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2021-06-05 07:14:59,295 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-06-05 07:15:00,404 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-06-05 07:15:00,981 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2021-06-05 07:15:01,310 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2021-06-05 07:15:02,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:02,052 INFO L93 Difference]: Finished difference Result 78799 states and 296374 transitions. [2021-06-05 07:15:02,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 07:15:02,052 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 30 [2021-06-05 07:15:02,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:02,574 INFO L225 Difference]: With dead ends: 78799 [2021-06-05 07:15:02,574 INFO L226 Difference]: Without dead ends: 78784 [2021-06-05 07:15:02,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1413 ImplicationChecksByTransitivity, 3139.1ms TimeCoverageRelationStatistics Valid=747, Invalid=3543, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 07:15:02,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78784 states. [2021-06-05 07:15:03,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78784 to 51046. [2021-06-05 07:15:03,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51046 states, 51045 states have (on average 3.8747771574101284) internal successors, (197788), 51045 states have internal predecessors, (197788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:04,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51046 states to 51046 states and 197788 transitions. [2021-06-05 07:15:04,053 INFO L78 Accepts]: Start accepts. Automaton has 51046 states and 197788 transitions. Word has length 30 [2021-06-05 07:15:04,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:04,053 INFO L482 AbstractCegarLoop]: Abstraction has 51046 states and 197788 transitions. [2021-06-05 07:15:04,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2021-06-05 07:15:04,054 INFO L276 IsEmpty]: Start isEmpty. Operand 51046 states and 197788 transitions. [2021-06-05 07:15:04,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:15:04,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:04,141 INFO L521 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] [2021-06-05 07:15:04,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 289 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-06-05 07:15:04,342 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:04,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:04,342 INFO L82 PathProgramCache]: Analyzing trace with hash -2136041370, now seen corresponding path program 199 times [2021-06-05 07:15:04,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:04,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632582474] [2021-06-05 07:15:04,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:04,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:04,517 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:04,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:04,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632582474] [2021-06-05 07:15:04,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632582474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:04,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196296174] [2021-06-05 07:15:04,518 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 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:04,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:04,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 07:15:04,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:04,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:15:04,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:04,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:04,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:04,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:04,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:15:04,868 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 41 treesize of output 25 [2021-06-05 07:15:04,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:15:04,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:15:04,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:15:04,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:64, output treesize:22 [2021-06-05 07:15:04,921 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:04,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196296174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:04,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:04,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 07:15:04,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921415909] [2021-06-05 07:15:04,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:15:04,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:04,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:15:04,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:15:04,922 INFO L87 Difference]: Start difference. First operand 51046 states and 197788 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:06,702 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-06-05 07:15:10,418 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-06-05 07:15:11,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:11,381 INFO L93 Difference]: Finished difference Result 96322 states and 356717 transitions. [2021-06-05 07:15:11,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 07:15:11,382 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:15:11,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:11,648 INFO L225 Difference]: With dead ends: 96322 [2021-06-05 07:15:11,648 INFO L226 Difference]: Without dead ends: 96271 [2021-06-05 07:15:11,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2505 ImplicationChecksByTransitivity, 4956.5ms TimeCoverageRelationStatistics Valid=1004, Invalid=6478, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 07:15:11,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96271 states. [2021-06-05 07:15:13,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96271 to 51050. [2021-06-05 07:15:13,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51050 states, 51049 states have (on average 3.874826147426982) internal successors, (197806), 51049 states have internal predecessors, (197806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:13,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51050 states to 51050 states and 197806 transitions. [2021-06-05 07:15:13,377 INFO L78 Accepts]: Start accepts. Automaton has 51050 states and 197806 transitions. Word has length 30 [2021-06-05 07:15:13,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:13,377 INFO L482 AbstractCegarLoop]: Abstraction has 51050 states and 197806 transitions. [2021-06-05 07:15:13,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:13,377 INFO L276 IsEmpty]: Start isEmpty. Operand 51050 states and 197806 transitions. [2021-06-05 07:15:13,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:15:13,467 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:13,467 INFO L521 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] [2021-06-05 07:15:13,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-06-05 07:15:13,668 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:13,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:13,668 INFO L82 PathProgramCache]: Analyzing trace with hash -302392718, now seen corresponding path program 200 times [2021-06-05 07:15:13,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:13,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927316770] [2021-06-05 07:15:13,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:13,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:14,002 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-06-05 07:15:14,172 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:14,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:14,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927316770] [2021-06-05 07:15:14,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927316770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:14,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891943579] [2021-06-05 07:15:14,172 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 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:14,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:15:14,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:14,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 07:15:14,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:14,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:14,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:14,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:14,414 INFO L354 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2021-06-05 07:15:14,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 12 case distinctions, treesize of input 82 treesize of output 80 [2021-06-05 07:15:14,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:15:14,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:15:14,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:15:14,427 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:87, output treesize:22 [2021-06-05 07:15:14,474 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:14,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891943579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:14,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:14,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 07:15:14,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978283129] [2021-06-05 07:15:14,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:15:14,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:14,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:15:14,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:15:14,475 INFO L87 Difference]: Start difference. First operand 51050 states and 197806 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:18,204 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2021-06-05 07:15:18,711 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2021-06-05 07:15:18,938 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2021-06-05 07:15:19,491 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2021-06-05 07:15:20,091 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2021-06-05 07:15:21,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:21,325 INFO L93 Difference]: Finished difference Result 98122 states and 365133 transitions. [2021-06-05 07:15:21,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 07:15:21,325 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:15:21,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:21,583 INFO L225 Difference]: With dead ends: 98122 [2021-06-05 07:15:21,583 INFO L226 Difference]: Without dead ends: 98092 [2021-06-05 07:15:21,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2561 ImplicationChecksByTransitivity, 5124.0ms TimeCoverageRelationStatistics Valid=993, Invalid=6839, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 07:15:21,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98092 states. [2021-06-05 07:15:23,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98092 to 51052. [2021-06-05 07:15:23,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51052 states, 51051 states have (on average 3.874850639556522) internal successors, (197815), 51051 states have internal predecessors, (197815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:23,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51052 states to 51052 states and 197815 transitions. [2021-06-05 07:15:23,335 INFO L78 Accepts]: Start accepts. Automaton has 51052 states and 197815 transitions. Word has length 30 [2021-06-05 07:15:23,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:23,335 INFO L482 AbstractCegarLoop]: Abstraction has 51052 states and 197815 transitions. [2021-06-05 07:15:23,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:23,335 INFO L276 IsEmpty]: Start isEmpty. Operand 51052 states and 197815 transitions. [2021-06-05 07:15:23,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:15:23,421 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:23,421 INFO L521 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] [2021-06-05 07:15:23,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable557,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:23,621 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:23,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:23,621 INFO L82 PathProgramCache]: Analyzing trace with hash -225306266, now seen corresponding path program 201 times [2021-06-05 07:15:23,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:23,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130705369] [2021-06-05 07:15:23,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:23,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:23,873 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:23,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:23,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130705369] [2021-06-05 07:15:23,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130705369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:23,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401009960] [2021-06-05 07:15:23,873 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 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:23,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:15:23,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:23,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 07:15:23,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:24,457 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-06-05 07:15:24,583 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:15:24,583 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 27 treesize of output 55 [2021-06-05 07:15:24,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:15:24,636 INFO L628 ElimStorePlain]: treesize reduction 68, result has 39.8 percent of original size [2021-06-05 07:15:24,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 07:15:24,651 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:82 [2021-06-05 07:15:24,760 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:24,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401009960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:24,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:24,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 07:15:24,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128407996] [2021-06-05 07:15:24,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:15:24,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:24,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:15:24,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:15:24,761 INFO L87 Difference]: Start difference. First operand 51052 states and 197815 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:27,652 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-06-05 07:15:27,847 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2021-06-05 07:15:29,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:29,269 INFO L93 Difference]: Finished difference Result 63398 states and 235417 transitions. [2021-06-05 07:15:29,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 07:15:29,269 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:15:29,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:29,443 INFO L225 Difference]: With dead ends: 63398 [2021-06-05 07:15:29,443 INFO L226 Difference]: Without dead ends: 63290 [2021-06-05 07:15:29,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 3570.6ms TimeCoverageRelationStatistics Valid=699, Invalid=3333, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 07:15:29,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63290 states. [2021-06-05 07:15:30,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63290 to 51149. [2021-06-05 07:15:30,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51149 states, 51148 states have (on average 3.875674513177446) internal successors, (198233), 51148 states have internal predecessors, (198233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:30,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51149 states to 51149 states and 198233 transitions. [2021-06-05 07:15:30,754 INFO L78 Accepts]: Start accepts. Automaton has 51149 states and 198233 transitions. Word has length 30 [2021-06-05 07:15:30,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:30,754 INFO L482 AbstractCegarLoop]: Abstraction has 51149 states and 198233 transitions. [2021-06-05 07:15:30,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:30,754 INFO L276 IsEmpty]: Start isEmpty. Operand 51149 states and 198233 transitions. [2021-06-05 07:15:30,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:15:30,837 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:30,838 INFO L521 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] [2021-06-05 07:15:31,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2021-06-05 07:15:31,038 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:31,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:31,038 INFO L82 PathProgramCache]: Analyzing trace with hash 348756454, now seen corresponding path program 202 times [2021-06-05 07:15:31,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:31,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304235950] [2021-06-05 07:15:31,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:31,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:31,244 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:31,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:31,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304235950] [2021-06-05 07:15:31,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304235950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:31,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32724744] [2021-06-05 07:15:31,245 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 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:31,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:15:31,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:31,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 07:15:31,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:31,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:31,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:31,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:31,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:15:31,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:31,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:15:31,539 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 29 treesize of output 15 [2021-06-05 07:15:31,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:15:31,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:15:31,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:15:31,545 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:5 [2021-06-05 07:15:31,565 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:31,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32724744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:31,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:31,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 07:15:31,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948058880] [2021-06-05 07:15:31,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:15:31,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:31,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:15:31,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:15:31,566 INFO L87 Difference]: Start difference. First operand 51149 states and 198233 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:32,393 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-06-05 07:15:36,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:36,455 INFO L93 Difference]: Finished difference Result 90253 states and 334745 transitions. [2021-06-05 07:15:36,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 07:15:36,455 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:15:36,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:36,695 INFO L225 Difference]: With dead ends: 90253 [2021-06-05 07:15:36,695 INFO L226 Difference]: Without dead ends: 90208 [2021-06-05 07:15:36,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1942 ImplicationChecksByTransitivity, 3459.5ms TimeCoverageRelationStatistics Valid=745, Invalid=5417, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 07:15:36,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90208 states. [2021-06-05 07:15:38,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90208 to 51198. [2021-06-05 07:15:38,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51198 states, 51197 states have (on average 3.875871633103502) internal successors, (198433), 51197 states have internal predecessors, (198433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:38,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51198 states to 51198 states and 198433 transitions. [2021-06-05 07:15:38,362 INFO L78 Accepts]: Start accepts. Automaton has 51198 states and 198433 transitions. Word has length 30 [2021-06-05 07:15:38,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:38,362 INFO L482 AbstractCegarLoop]: Abstraction has 51198 states and 198433 transitions. [2021-06-05 07:15:38,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:38,362 INFO L276 IsEmpty]: Start isEmpty. Operand 51198 states and 198433 transitions. [2021-06-05 07:15:38,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:15:38,445 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:38,445 INFO L521 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] [2021-06-05 07:15:38,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:38,646 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:38,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:38,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1442848042, now seen corresponding path program 203 times [2021-06-05 07:15:38,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:38,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625287745] [2021-06-05 07:15:38,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:38,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:38,840 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:38,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:38,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625287745] [2021-06-05 07:15:38,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625287745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:38,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167706341] [2021-06-05 07:15:38,841 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 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:38,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:15:38,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:38,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 07:15:38,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:39,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:39,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:39,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:39,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:39,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:39,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:39,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:39,440 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:15:39,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 55 [2021-06-05 07:15:39,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:15:39,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:15:39,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:15:39,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:22 [2021-06-05 07:15:39,504 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:39,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167706341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:39,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:39,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 07:15:39,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590366371] [2021-06-05 07:15:39,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:15:39,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:39,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:15:39,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:15:39,505 INFO L87 Difference]: Start difference. First operand 51198 states and 198433 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:42,898 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-06-05 07:15:45,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:45,494 INFO L93 Difference]: Finished difference Result 89164 states and 331673 transitions. [2021-06-05 07:15:45,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 07:15:45,495 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:15:45,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:45,750 INFO L225 Difference]: With dead ends: 89164 [2021-06-05 07:15:45,751 INFO L226 Difference]: Without dead ends: 89134 [2021-06-05 07:15:45,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2803 ImplicationChecksByTransitivity, 4246.2ms TimeCoverageRelationStatistics Valid=760, Invalid=7796, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 07:15:45,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89134 states. [2021-06-05 07:15:47,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89134 to 51198. [2021-06-05 07:15:47,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51198 states, 51197 states have (on average 3.875754438736645) internal successors, (198427), 51197 states have internal predecessors, (198427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:47,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51198 states to 51198 states and 198427 transitions. [2021-06-05 07:15:47,529 INFO L78 Accepts]: Start accepts. Automaton has 51198 states and 198427 transitions. Word has length 30 [2021-06-05 07:15:47,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:47,529 INFO L482 AbstractCegarLoop]: Abstraction has 51198 states and 198427 transitions. [2021-06-05 07:15:47,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:47,529 INFO L276 IsEmpty]: Start isEmpty. Operand 51198 states and 198427 transitions. [2021-06-05 07:15:47,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:15:47,615 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:47,615 INFO L521 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] [2021-06-05 07:15:47,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:47,816 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:47,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:47,816 INFO L82 PathProgramCache]: Analyzing trace with hash -703322718, now seen corresponding path program 204 times [2021-06-05 07:15:47,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:47,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084680449] [2021-06-05 07:15:47,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:47,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:47,981 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:47,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:47,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084680449] [2021-06-05 07:15:47,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084680449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:47,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506927567] [2021-06-05 07:15:47,981 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 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:48,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:15:48,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:48,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 07:15:48,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:48,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:48,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:48,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:48,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:15:48,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:48,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:15:48,270 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 29 treesize of output 15 [2021-06-05 07:15:48,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:15:48,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:15:48,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:15:48,276 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:5 [2021-06-05 07:15:48,296 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:48,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506927567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:48,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:48,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 07:15:48,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525373491] [2021-06-05 07:15:48,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:15:48,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:48,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:15:48,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:15:48,297 INFO L87 Difference]: Start difference. First operand 51198 states and 198427 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:53,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:53,633 INFO L93 Difference]: Finished difference Result 100466 states and 369497 transitions. [2021-06-05 07:15:53,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 07:15:53,634 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:15:53,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:54,008 INFO L225 Difference]: With dead ends: 100466 [2021-06-05 07:15:54,009 INFO L226 Difference]: Without dead ends: 100421 [2021-06-05 07:15:54,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2333 ImplicationChecksByTransitivity, 3850.8ms TimeCoverageRelationStatistics Valid=949, Invalid=6191, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 07:15:54,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100421 states. [2021-06-05 07:15:55,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100421 to 51219. [2021-06-05 07:15:55,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51219 states, 51218 states have (on average 3.875727283376938) internal successors, (198507), 51218 states have internal predecessors, (198507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:55,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51219 states to 51219 states and 198507 transitions. [2021-06-05 07:15:55,763 INFO L78 Accepts]: Start accepts. Automaton has 51219 states and 198507 transitions. Word has length 30 [2021-06-05 07:15:55,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:55,763 INFO L482 AbstractCegarLoop]: Abstraction has 51219 states and 198507 transitions. [2021-06-05 07:15:55,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:55,763 INFO L276 IsEmpty]: Start isEmpty. Operand 51219 states and 198507 transitions. [2021-06-05 07:15:55,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:15:55,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:55,846 INFO L521 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] [2021-06-05 07:15:56,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable577,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:56,047 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:56,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:56,047 INFO L82 PathProgramCache]: Analyzing trace with hash 103853306, now seen corresponding path program 205 times [2021-06-05 07:15:56,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:56,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84979593] [2021-06-05 07:15:56,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:56,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:56,253 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:56,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:56,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84979593] [2021-06-05 07:15:56,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84979593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:56,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206221333] [2021-06-05 07:15:56,254 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 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:56,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:56,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 07:15:56,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:56,552 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-06-05 07:15:56,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 53 [2021-06-05 07:15:56,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:15:56,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:15:56,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:15:56,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:84, output treesize:5 [2021-06-05 07:15:56,576 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:56,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206221333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:56,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:56,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 07:15:56,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649807421] [2021-06-05 07:15:56,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:15:56,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:56,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:15:56,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:15:56,577 INFO L87 Difference]: Start difference. First operand 51219 states and 198507 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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) [2021-06-05 07:15:59,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:59,318 INFO L93 Difference]: Finished difference Result 72664 states and 274266 transitions. [2021-06-05 07:15:59,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 07:15:59,319 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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 30 [2021-06-05 07:15:59,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:59,518 INFO L225 Difference]: With dead ends: 72664 [2021-06-05 07:15:59,518 INFO L226 Difference]: Without dead ends: 72586 [2021-06-05 07:15:59,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1566.5ms TimeCoverageRelationStatistics Valid=538, Invalid=1718, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:15:59,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72586 states. [2021-06-05 07:16:00,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72586 to 51288. [2021-06-05 07:16:01,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51288 states, 51287 states have (on average 3.8757969855908905) internal successors, (198778), 51287 states have internal predecessors, (198778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:16:01,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51288 states to 51288 states and 198778 transitions. [2021-06-05 07:16:01,208 INFO L78 Accepts]: Start accepts. Automaton has 51288 states and 198778 transitions. Word has length 30 [2021-06-05 07:16:01,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:16:01,208 INFO L482 AbstractCegarLoop]: Abstraction has 51288 states and 198778 transitions. [2021-06-05 07:16:01,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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) [2021-06-05 07:16:01,208 INFO L276 IsEmpty]: Start isEmpty. Operand 51288 states and 198778 transitions. [2021-06-05 07:16:01,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:16:01,294 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:16:01,294 INFO L521 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] [2021-06-05 07:16:01,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable578 [2021-06-05 07:16:01,495 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:16:01,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:16:01,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1693723682, now seen corresponding path program 206 times [2021-06-05 07:16:01,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:16:01,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091369442] [2021-06-05 07:16:01,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:16:01,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:16:01,701 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:16:01,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:16:01,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091369442] [2021-06-05 07:16:01,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091369442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:16:01,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68320560] [2021-06-05 07:16:01,701 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 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:16:01,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:16:01,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:16:01,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 07:16:01,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:16:01,912 INFO L354 Elim1Store]: treesize reduction 41, result has 16.3 percent of original size [2021-06-05 07:16:01,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 66 [2021-06-05 07:16:01,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:16:01,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:16:01,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:16:01,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:88, output treesize:17 [2021-06-05 07:16:01,959 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:16:01,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68320560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:16:01,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:16:01,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 07:16:01,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990178293] [2021-06-05 07:16:01,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:16:01,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:16:01,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:16:01,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:16:01,960 INFO L87 Difference]: Start difference. First operand 51288 states and 198778 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:16:04,120 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-06-05 07:16:05,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:16:05,774 INFO L93 Difference]: Finished difference Result 74850 states and 281175 transitions. [2021-06-05 07:16:05,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 07:16:05,775 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:16:05,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:16:05,985 INFO L225 Difference]: With dead ends: 74850 [2021-06-05 07:16:05,986 INFO L226 Difference]: Without dead ends: 74784 [2021-06-05 07:16:05,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 2658.0ms TimeCoverageRelationStatistics Valid=630, Invalid=2792, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 07:16:06,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74784 states. [2021-06-05 07:16:07,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74784 to 51286. [2021-06-05 07:16:07,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51286 states, 51285 states have (on average 3.8756556498001364) internal successors, (198763), 51285 states have internal predecessors, (198763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:16:07,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51286 states to 51286 states and 198763 transitions. [2021-06-05 07:16:07,856 INFO L78 Accepts]: Start accepts. Automaton has 51286 states and 198763 transitions. Word has length 30 [2021-06-05 07:16:07,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:16:07,856 INFO L482 AbstractCegarLoop]: Abstraction has 51286 states and 198763 transitions. [2021-06-05 07:16:07,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:16:07,856 INFO L276 IsEmpty]: Start isEmpty. Operand 51286 states and 198763 transitions. [2021-06-05 07:16:07,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:16:07,962 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:16:07,962 INFO L521 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] [2021-06-05 07:16:08,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-06-05 07:16:08,163 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:16:08,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:16:08,163 INFO L82 PathProgramCache]: Analyzing trace with hash -2086344974, now seen corresponding path program 207 times [2021-06-05 07:16:08,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:16:08,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164892577] [2021-06-05 07:16:08,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:16:08,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:16:08,326 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:16:08,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:16:08,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164892577] [2021-06-05 07:16:08,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164892577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:16:08,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641799918] [2021-06-05 07:16:08,326 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 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:16:08,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:16:08,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:16:08,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 07:16:08,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:16:08,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:16:08,723 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:16:08,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 27 treesize of output 79 [2021-06-05 07:16:08,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:16:09,164 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 73 [2021-06-05 07:16:09,164 INFO L628 ElimStorePlain]: treesize reduction 588, result has 22.5 percent of original size [2021-06-05 07:16:09,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:16:09,225 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:756 [2021-06-05 07:16:09,592 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 69 [2021-06-05 07:16:09,790 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:16:09,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641799918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:16:09,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:16:09,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 26 [2021-06-05 07:16:09,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207614603] [2021-06-05 07:16:09,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 07:16:09,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:16:09,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 07:16:09,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:16:09,792 INFO L87 Difference]: Start difference. First operand 51286 states and 198763 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:16:10,411 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-06-05 07:16:10,932 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 39 [2021-06-05 07:16:15,383 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-06-05 07:16:15,653 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2021-06-05 07:16:15,877 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-06-05 07:16:16,022 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 36 [2021-06-05 07:16:16,270 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 67 [2021-06-05 07:16:16,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:16:16,671 INFO L93 Difference]: Finished difference Result 99242 states and 366200 transitions. [2021-06-05 07:16:16,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 07:16:16,671 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:16:16,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:16:16,954 INFO L225 Difference]: With dead ends: 99242 [2021-06-05 07:16:16,954 INFO L226 Difference]: Without dead ends: 99212 [2021-06-05 07:16:16,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 5669.0ms TimeCoverageRelationStatistics Valid=882, Invalid=6774, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 07:16:17,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99212 states. [2021-06-05 07:16:18,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99212 to 51295. [2021-06-05 07:16:18,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51295 states, 51294 states have (on average 3.875560494404804) internal successors, (198793), 51294 states have internal predecessors, (198793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:16:18,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51295 states to 51295 states and 198793 transitions. [2021-06-05 07:16:18,942 INFO L78 Accepts]: Start accepts. Automaton has 51295 states and 198793 transitions. Word has length 30 [2021-06-05 07:16:18,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:16:18,942 INFO L482 AbstractCegarLoop]: Abstraction has 51295 states and 198793 transitions. [2021-06-05 07:16:18,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:16:18,943 INFO L276 IsEmpty]: Start isEmpty. Operand 51295 states and 198793 transitions. [2021-06-05 07:16:19,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:16:19,030 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:16:19,030 INFO L521 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] [2021-06-05 07:16:19,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:16:19,230 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:16:19,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:16:19,231 INFO L82 PathProgramCache]: Analyzing trace with hash 714714600, now seen corresponding path program 208 times [2021-06-05 07:16:19,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:16:19,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232199043] [2021-06-05 07:16:19,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:16:19,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:16:19,441 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:16:19,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:16:19,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232199043] [2021-06-05 07:16:19,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232199043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:16:19,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963129998] [2021-06-05 07:16:19,442 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 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:16:19,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:16:19,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:16:19,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 07:16:19,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:16:19,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:16:19,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:16:19,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:16:19,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:16:19,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:16:19,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:16:19,752 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 29 treesize of output 15 [2021-06-05 07:16:19,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:16:19,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:16:19,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:16:19,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:5 [2021-06-05 07:16:19,778 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:16:19,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963129998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:16:19,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:16:19,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 07:16:19,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754273536] [2021-06-05 07:16:19,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:16:19,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:16:19,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:16:19,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:16:19,779 INFO L87 Difference]: Start difference. First operand 51295 states and 198793 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2021-06-05 07:16:21,779 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-06-05 07:16:24,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:16:24,108 INFO L93 Difference]: Finished difference Result 88709 states and 330422 transitions. [2021-06-05 07:16:24,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 07:16:24,108 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 30 [2021-06-05 07:16:24,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:16:24,346 INFO L225 Difference]: With dead ends: 88709 [2021-06-05 07:16:24,346 INFO L226 Difference]: Without dead ends: 88679 [2021-06-05 07:16:24,347 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 3234.6ms TimeCoverageRelationStatistics Valid=694, Invalid=4276, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 07:16:24,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88679 states. [2021-06-05 07:16:25,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88679 to 51308. [2021-06-05 07:16:25,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51308 states, 51307 states have (on average 3.8756504960336797) internal successors, (198848), 51307 states have internal predecessors, (198848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:16:26,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51308 states to 51308 states and 198848 transitions. [2021-06-05 07:16:26,084 INFO L78 Accepts]: Start accepts. Automaton has 51308 states and 198848 transitions. Word has length 30 [2021-06-05 07:16:26,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:16:26,084 INFO L482 AbstractCegarLoop]: Abstraction has 51308 states and 198848 transitions. [2021-06-05 07:16:26,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2021-06-05 07:16:26,084 INFO L276 IsEmpty]: Start isEmpty. Operand 51308 states and 198848 transitions. [2021-06-05 07:16:26,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:16:26,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:16:26,171 INFO L521 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] [2021-06-05 07:16:26,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable621,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:16:26,372 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:16:26,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:16:26,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1077811610, now seen corresponding path program 209 times [2021-06-05 07:16:26,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:16:26,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482128304] [2021-06-05 07:16:26,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:16:26,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:16:26,536 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:16:26,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:16:26,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482128304] [2021-06-05 07:16:26,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482128304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:16:26,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862189703] [2021-06-05 07:16:26,537 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 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:16:26,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:16:26,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:16:26,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:16:26,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:16:26,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:16:26,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:16:26,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:16:26,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:16:26,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:16:26,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:16:26,931 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 27 treesize of output 15 [2021-06-05 07:16:26,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:16:26,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:16:26,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:16:26,939 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:43, output treesize:5 [2021-06-05 07:16:26,959 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:16:26,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862189703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:16:26,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:16:26,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 07:16:26,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090672000] [2021-06-05 07:16:26,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:16:26,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:16:26,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:16:26,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:16:26,960 INFO L87 Difference]: Start difference. First operand 51308 states and 198848 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:16:32,094 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-06-05 07:16:32,377 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2021-06-05 07:16:33,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:16:33,132 INFO L93 Difference]: Finished difference Result 100753 states and 371531 transitions. [2021-06-05 07:16:33,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 07:16:33,132 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-06-05 07:16:33,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:16:33,424 INFO L225 Difference]: With dead ends: 100753 [2021-06-05 07:16:33,424 INFO L226 Difference]: Without dead ends: 100723 [2021-06-05 07:16:33,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1638 ImplicationChecksByTransitivity, 4075.8ms TimeCoverageRelationStatistics Valid=829, Invalid=4721, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 07:16:33,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100723 states. [2021-06-05 07:16:34,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100723 to 51325. [2021-06-05 07:16:35,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51325 states, 51324 states have (on average 3.875944977008807) internal successors, (198929), 51324 states have internal predecessors, (198929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:16:35,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51325 states to 51325 states and 198929 transitions. [2021-06-05 07:16:35,193 INFO L78 Accepts]: Start accepts. Automaton has 51325 states and 198929 transitions. Word has length 30 [2021-06-05 07:16:35,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:16:35,193 INFO L482 AbstractCegarLoop]: Abstraction has 51325 states and 198929 transitions. [2021-06-05 07:16:35,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:16:35,193 INFO L276 IsEmpty]: Start isEmpty. Operand 51325 states and 198929 transitions. [2021-06-05 07:16:35,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:16:35,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:16:35,277 INFO L521 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] [2021-06-05 07:16:35,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable622 [2021-06-05 07:16:35,477 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:16:35,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:16:35,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1599622906, now seen corresponding path program 210 times [2021-06-05 07:16:35,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:16:35,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278788282] [2021-06-05 07:16:35,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:16:35,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:16:35,644 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:16:35,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:16:35,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278788282] [2021-06-05 07:16:35,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278788282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:16:35,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417624958] [2021-06-05 07:16:35,645 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 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:16:35,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:16:35,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:16:35,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 07:16:35,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:16:36,391 INFO L354 Elim1Store]: treesize reduction 16, result has 82.0 percent of original size [2021-06-05 07:16:36,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 116 treesize of output 131 [2021-06-05 07:16:36,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:16:37,174 WARN L205 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 93 [2021-06-05 07:16:37,175 INFO L628 ElimStorePlain]: treesize reduction 561, result has 33.1 percent of original size [2021-06-05 07:16:37,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:16:37,315 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:129, output treesize:1483 [2021-06-05 07:16:38,385 WARN L205 SmtUtils]: Spent 923.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 100 [2021-06-05 07:16:38,686 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2021-06-05 07:16:38,921 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:16:38,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417624958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:16:38,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:16:38,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 26 [2021-06-05 07:16:38,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786777359] [2021-06-05 07:16:38,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 07:16:38,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:16:38,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 07:16:38,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:16:38,921 INFO L87 Difference]: Start difference. First operand 51325 states and 198929 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:16:41,108 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 128 [2021-06-05 07:16:45,169 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2021-06-05 07:16:45,515 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 104 [2021-06-05 07:16:46,209 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2021-06-05 07:16:46,657 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 131 [2021-06-05 07:16:46,897 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 69 [2021-06-05 07:16:47,206 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 96 [2021-06-05 07:16:47,587 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 117 [2021-06-05 07:16:48,086 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 127 [2021-06-05 07:16:48,660 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 116 [2021-06-05 07:16:49,029 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 68 [2021-06-05 07:16:49,302 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 79 [2021-06-05 07:16:49,615 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 61 [2021-06-05 07:16:49,988 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 88 [2021-06-05 07:16:50,309 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 93 [2021-06-05 07:16:50,784 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 80 [2021-06-05 07:16:51,286 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 87 [2021-06-05 07:16:51,770 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 93 [2021-06-05 07:16:52,375 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 99 Received shutdown request... [2021-06-05 07:16:52,621 WARN L222 SmtUtils]: Removed 15 from assertion stack [2021-06-05 07:16:52,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 07:16:52,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable623,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:16:52,821 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 07:16:52,823 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 07:16:52,824 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 07:16:52,825 INFO L202 PluginConnector]: Adding new model sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 07:16:52 BasicIcfg [2021-06-05 07:16:52,825 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 07:16:52,825 INFO L168 Benchmark]: Toolchain (without parser) took 757900.25 ms. Allocated memory was 348.1 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 327.4 MB in the beginning and 12.7 GB in the end (delta: -12.4 GB). Peak memory consumption was 3.3 GB. Max. memory is 16.0 GB. [2021-06-05 07:16:52,825 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 348.1 MB. Free memory was 328.5 MB in the beginning and 328.5 MB in the end (delta: 65.7 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 07:16:52,825 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.66 ms. Allocated memory is still 348.1 MB. Free memory was 327.3 MB in the beginning and 325.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 07:16:52,825 INFO L168 Benchmark]: Boogie Preprocessor took 19.03 ms. Allocated memory is still 348.1 MB. Free memory was 325.8 MB in the beginning and 324.8 MB in the end (delta: 999.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 07:16:52,826 INFO L168 Benchmark]: RCFGBuilder took 299.56 ms. Allocated memory is still 348.1 MB. Free memory was 324.8 MB in the beginning and 312.1 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 07:16:52,826 INFO L168 Benchmark]: TraceAbstraction took 757548.45 ms. Allocated memory was 348.1 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 311.6 MB in the beginning and 12.7 GB in the end (delta: -12.4 GB). Peak memory consumption was 3.3 GB. Max. memory is 16.0 GB. [2021-06-05 07:16:52,826 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 348.1 MB. Free memory was 328.5 MB in the beginning and 328.5 MB in the end (delta: 65.7 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 28.66 ms. Allocated memory is still 348.1 MB. Free memory was 327.3 MB in the beginning and 325.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 19.03 ms. Allocated memory is still 348.1 MB. Free memory was 325.8 MB in the beginning and 324.8 MB in the end (delta: 999.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 299.56 ms. Allocated memory is still 348.1 MB. Free memory was 324.8 MB in the beginning and 312.1 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 757548.45 ms. Allocated memory was 348.1 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 311.6 MB in the beginning and 12.7 GB in the end (delta: -12.4 GB). Peak memory consumption was 3.3 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (51325states) and FLOYD_HOARE automaton (currently 89 states, 26 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 168 for 164ms.. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (51325states) and FLOYD_HOARE automaton (currently 89 states, 26 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 168 for 164ms.. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (51325states) and FLOYD_HOARE automaton (currently 89 states, 26 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 168 for 164ms.. - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (51325states) and FLOYD_HOARE automaton (currently 89 states, 26 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 168 for 164ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 757398.5ms, OverallIterations: 302, TraceHistogramMax: 3, EmptinessCheckTime: 9997.4ms, AutomataDifference: 428248.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 36.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 14983 SDtfs, 84846 SDslu, 126178 SDs, 0 SdLazy, 210200 SolverSat, 15153 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 104325.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20151 GetRequests, 6343 SyntacticMatches, 373 SemanticMatches, 13434 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238814 ImplicationChecksByTransitivity, 294738.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=55780occurred in iteration=259, InterpolantAutomatonStates: 11693, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 159455.2ms AutomataMinimizationTime, 301 MinimizatonAttempts, 2439722 StatesRemovedByMinimization, 300 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1118.0ms SsaConstructionTime, 2972.8ms SatisfiabilityAnalysisTime, 88138.7ms InterpolantComputationTime, 16318 NumberOfCodeBlocks, 16318 NumberOfCodeBlocksAsserted, 1053 NumberOfCheckSat, 15716 ConstructedInterpolants, 392 QuantifiedInterpolants, 191650 SizeOfPredicates, 1448 NumberOfNonLiveVariables, 21250 ConjunctsInSsa, 5274 ConjunctsInUnsatCore, 602 InterpolantComputations, 2 PerfectInterpolantSequences, 1056/5525 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown